FHIR R5 Symptoms Implementation Guide
0.1.0 - ci-build International flag

FHIR R5 Symptoms Implementation Guide, published by HL7 International / Clinical Interoperability Council. This guide is not an authorized publication; it is the continuous build for version 0.1.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/fhir-symptoms-ig/ and changes regularly. See the Directory of published versions

Logical Model: SymptomLogicalModel - Detailed Descriptions

Page standards status: Draft Maturity Level: 1

Definitions for the SymptomLogicalModel logical model.

Guidance on how to interpret the contents of this table can be foundhere

0. SymptomLogicalModel
Definition

Details about the Symptom.


Base definition for all elements in a resource.

ShortSymptom Logical ModelBase for all elements
Control0..*
Is Modifierfalse
Logical ModelInstances of this logical model are not marked to be the target of a Reference
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
2. SymptomLogicalModel.id
Definition

Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

ShortUnique id for inter-element referencing
Control0..1
This element is affected by the following invariants: ele-1
Typestring
Is Modifierfalse
XML FormatIn the XML format, this property is represented as an attribute.
Summaryfalse
4. SymptomLogicalModel.extension
Definition

May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

ShortAdditional content defined by implementations
Comments

There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

Control0..*
TypeExtension
Is Modifierfalse
Summaryfalse
Alternate Namesextensions, user content
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
SlicingThis element introduces a set of slices on SymptomLogicalModel.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
  • value @ url
  • 6. SymptomLogicalModel.identifier
    Definition

    A unique string that identifies this instance of a symptom

    ShortA unique string that identifies this instance of a symptom
    NoteThis is a business identifier, not a resource identifier (see discussion)
    Control1..1
    Typestring
    Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
    8. SymptomLogicalModel.symptomCode
    Definition

    Coded description of symptom

    ShortCoded description of symptom
    Control1..1
    TypeCodeableConcept
    10. SymptomLogicalModel.affectedPatient
    Definition

    The patient who is experiencing the symptom

    ShortThe patient who is experiencing the symptom
    Control1..1
    TypePatient
    12. SymptomLogicalModel.reporter[x]
    Definition

    The person who is reporting the symptom information

    ShortThe person who is reporting the symptom information
    Control1..1
    TypeChoice of: Patient, RelatedPerson
    [x] NoteSeeChoice of Data Typesfor further information about how to use [x]
    14. SymptomLogicalModel.symptomDescription
    Definition

    Textual description of symptom as provided by patient or care team member

    ShortTextual description of symptom as provided by patient or care team member
    Control0..*
    TypeAnnotation
    16. SymptomLogicalModel.location
    Definition

    Where the patient feels the symptom in the body.

    ShortWhere the patient feels the symptom in the body.
    Control0..*
    TypeBodyStructure
    18. SymptomLogicalModel.associatedSymptoms
    Definition

    Other symptoms associated with this symptom

    ShortOther symptoms associated with this symptom
    Control0..*
    Typehttp://hl7.org/fhir/uv/symptoms/StructureDefinition/SymptomLogicalModel
    20. SymptomLogicalModel.associatedConditions
    Definition

    Condition associated with this symptom

    ShortCondition associated with this symptom
    Control0..*
    TypeCondition
    22. SymptomLogicalModel.keyFeatures
    Definition

    The key features of the symptom

    ShortKey Features
    Control1..1
    TypeBackboneElement
    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    24. SymptomLogicalModel.keyFeatures.id
    Definition

    Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

    ShortUnique id for inter-element referencing
    Control0..1
    This element is affected by the following invariants: ele-1
    Typeidstring
    Is Modifierfalse
    XML FormatIn the XML format, this property is represented as an attribute.
    Summaryfalse
    26. SymptomLogicalModel.keyFeatures.extension
    Definition

    May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

    ShortAdditional content defined by implementations
    Comments

    There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

    Control0..*
    TypeExtension
    Is Modifierfalse
    Summaryfalse
    Alternate Namesextensions, user content
    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
    SlicingThis element introduces a set of slices on SymptomLogicalModel.keyFeatures.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
    • value @ url
    • 28. SymptomLogicalModel.keyFeatures.modifierExtension
      Definition

      May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

      Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

      ShortExtensions that cannot be ignored even if unrecognized
      Comments

      There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

      Control0..*
      TypeExtension
      Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
      Summarytrue
      Requirements

      Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

      Alternate Namesextensions, user content, modifiers
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
      30. SymptomLogicalModel.keyFeatures.quality
      Definition

      The patient's internal perception of the symptom.

      ShortThe patient's internal perception of the symptom.
      Control0..1
      TypeBackboneElement
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      32. SymptomLogicalModel.keyFeatures.quality.id
      Definition

      Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

      ShortUnique id for inter-element referencing
      Control0..1
      This element is affected by the following invariants: ele-1
      Typeidstring
      Is Modifierfalse
      XML FormatIn the XML format, this property is represented as an attribute.
      Summaryfalse
      34. SymptomLogicalModel.keyFeatures.quality.extension
      Definition

      May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

      ShortAdditional content defined by implementations
      Comments

      There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

      Control0..*
      TypeExtension
      Is Modifierfalse
      Summaryfalse
      Alternate Namesextensions, user content
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
      SlicingThis element introduces a set of slices on SymptomLogicalModel.keyFeatures.quality.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
      • value @ url
      • 36. SymptomLogicalModel.keyFeatures.quality.modifierExtension
        Definition

        May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

        Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

        ShortExtensions that cannot be ignored even if unrecognized
        Comments

        There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

        Control0..*
        TypeExtension
        Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
        Summarytrue
        Requirements

        Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

        Alternate Namesextensions, user content, modifiers
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
        38. SymptomLogicalModel.keyFeatures.quality.note
        Definition

        Textual description of the symptom quality

        ShortTextual description of the symptom quality
        Control0..1
        TypeAnnotation
        40. SymptomLogicalModel.keyFeatures.quality.scaleCode
        Definition

        Code for the specific scale or assessment (if any) used to determine the quality

        ShortCode for the specific scale or assessment (if any) used to determine the quality
        Control0..1
        Typecode
        Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
        42. SymptomLogicalModel.keyFeatures.quality.value
        Definition

        Code that represents the symptom quality

        ShortCode that represents the symptom quality
        Control1..1
        TypeCodeableConcept
        44. SymptomLogicalModel.keyFeatures.severity
        Definition

        The intensity with which the patient experiences the symptom.

        ShortThe intensity with which the patient experiences the symptom.
        Control0..1
        TypeBackboneElement
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        46. SymptomLogicalModel.keyFeatures.severity.id
        Definition

        Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

        ShortUnique id for inter-element referencing
        Control0..1
        This element is affected by the following invariants: ele-1
        Typeidstring
        Is Modifierfalse
        XML FormatIn the XML format, this property is represented as an attribute.
        Summaryfalse
        48. SymptomLogicalModel.keyFeatures.severity.extension
        Definition

        May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

        ShortAdditional content defined by implementations
        Comments

        There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

        Control0..*
        TypeExtension
        Is Modifierfalse
        Summaryfalse
        Alternate Namesextensions, user content
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
        SlicingThis element introduces a set of slices on SymptomLogicalModel.keyFeatures.severity.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
        • value @ url
        • 50. SymptomLogicalModel.keyFeatures.severity.modifierExtension
          Definition

          May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

          Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

          ShortExtensions that cannot be ignored even if unrecognized
          Comments

          There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

          Control0..*
          TypeExtension
          Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
          Summarytrue
          Requirements

          Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

          Alternate Namesextensions, user content, modifiers
          Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
          ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
          52. SymptomLogicalModel.keyFeatures.severity.note
          Definition

          Textual description of the symptom severity

          ShortTextual description of the symptom severity
          Control0..1
          TypeAnnotation
          54. SymptomLogicalModel.keyFeatures.severity.scaleCode
          Definition

          Code for the specific scale or assessment if any used to determine the severity

          ShortCode for the specific scale or assessment if any used to determine the severity
          Control0..1
          Typecode
          Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
          56. SymptomLogicalModel.keyFeatures.severity.value
          Definition

          Code that represents the symptom severity

          ShortCode that represents the symptom severity
          Control1..1
          TypeCodeableConcept
          58. SymptomLogicalModel.keyFeatures.functionalImpact
          Definition

          How the symptom affects the patient's daily activities.

          ShortHow the symptom affects the patient's daily activities.
          Control0..1
          TypeBackboneElement
          Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
          60. SymptomLogicalModel.keyFeatures.functionalImpact.id
          Definition

          Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

          ShortUnique id for inter-element referencing
          Control0..1
          This element is affected by the following invariants: ele-1
          Typeidstring
          Is Modifierfalse
          XML FormatIn the XML format, this property is represented as an attribute.
          Summaryfalse
          62. SymptomLogicalModel.keyFeatures.functionalImpact.extension
          Definition

          May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

          ShortAdditional content defined by implementations
          Comments

          There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

          Control0..*
          TypeExtension
          Is Modifierfalse
          Summaryfalse
          Alternate Namesextensions, user content
          Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
          ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
          SlicingThis element introduces a set of slices on SymptomLogicalModel.keyFeatures.functionalImpact.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
          • value @ url
          • 64. SymptomLogicalModel.keyFeatures.functionalImpact.modifierExtension
            Definition

            May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

            Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

            ShortExtensions that cannot be ignored even if unrecognized
            Comments

            There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

            Control0..*
            TypeExtension
            Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
            Summarytrue
            Requirements

            Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

            Alternate Namesextensions, user content, modifiers
            Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
            ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
            66. SymptomLogicalModel.keyFeatures.functionalImpact.note
            Definition

            Textual description of the impact

            ShortTextual description of the impact
            Control0..1
            TypeAnnotation
            68. SymptomLogicalModel.keyFeatures.functionalImpact.scaleCode
            Definition

            Code for the specific scale or assessment (if any) used to determine the impact

            ShortCode for the specific scale or assessment (if any) used to determine the impact
            Control0..1
            Typecode
            Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
            70. SymptomLogicalModel.keyFeatures.functionalImpact.value
            Definition

            Code that represents the functional impact

            ShortCode that represents the functional impact
            Control1..1
            TypeCodeableConcept
            72. SymptomLogicalModel.keyFeatures.affectiveGrade
            Definition

            Emotional or mental impact of a symptom.

            ShortEmotional or mental impact of a symptom.
            Control0..1
            TypeBackboneElement
            Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
            74. SymptomLogicalModel.keyFeatures.affectiveGrade.id
            Definition

            Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

            ShortUnique id for inter-element referencing
            Control0..1
            This element is affected by the following invariants: ele-1
            Typeidstring
            Is Modifierfalse
            XML FormatIn the XML format, this property is represented as an attribute.
            Summaryfalse
            76. SymptomLogicalModel.keyFeatures.affectiveGrade.extension
            Definition

            May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

            ShortAdditional content defined by implementations
            Comments

            There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

            Control0..*
            TypeExtension
            Is Modifierfalse
            Summaryfalse
            Alternate Namesextensions, user content
            Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
            ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
            SlicingThis element introduces a set of slices on SymptomLogicalModel.keyFeatures.affectiveGrade.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
            • value @ url
            • 78. SymptomLogicalModel.keyFeatures.affectiveGrade.modifierExtension
              Definition

              May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

              Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

              ShortExtensions that cannot be ignored even if unrecognized
              Comments

              There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

              Control0..*
              TypeExtension
              Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
              Summarytrue
              Requirements

              Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

              Alternate Namesextensions, user content, modifiers
              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
              ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
              80. SymptomLogicalModel.keyFeatures.affectiveGrade.note
              Definition

              Textual description of the grade

              ShortTextual description of the grade
              Control0..1
              TypeAnnotation
              82. SymptomLogicalModel.keyFeatures.affectiveGrade.value
              Definition

              Code that represents the affective grade

              ShortCode that represents the affective grade
              Control1..1
              TypeCodeableConcept
              84. SymptomLogicalModel.keyFeatures.surroundingEvents
              Definition

              What was occurring at the time of symptom onset.

              ShortWhat was occurring at the time of symptom onset.
              Control0..1
              TypeBackboneElement
              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
              86. SymptomLogicalModel.keyFeatures.surroundingEvents.id
              Definition

              Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

              ShortUnique id for inter-element referencing
              Control0..1
              This element is affected by the following invariants: ele-1
              Typeidstring
              Is Modifierfalse
              XML FormatIn the XML format, this property is represented as an attribute.
              Summaryfalse
              88. SymptomLogicalModel.keyFeatures.surroundingEvents.extension
              Definition

              May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

              ShortAdditional content defined by implementations
              Comments

              There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

              Control0..*
              TypeExtension
              Is Modifierfalse
              Summaryfalse
              Alternate Namesextensions, user content
              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
              ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
              SlicingThis element introduces a set of slices on SymptomLogicalModel.keyFeatures.surroundingEvents.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
              • value @ url
              • 90. SymptomLogicalModel.keyFeatures.surroundingEvents.modifierExtension
                Definition

                May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

                Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

                ShortExtensions that cannot be ignored even if unrecognized
                Comments

                There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                Control0..*
                TypeExtension
                Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
                Summarytrue
                Requirements

                Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

                Alternate Namesextensions, user content, modifiers
                Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
                92. SymptomLogicalModel.keyFeatures.surroundingEvents.triggers
                Definition

                Actions or environments that initiate the symptom.

                ShortActions or environments that initiate the symptom.
                Control0..*
                TypeBackboneElement
                Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                94. SymptomLogicalModel.keyFeatures.surroundingEvents.triggers.id
                Definition

                Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

                ShortUnique id for inter-element referencing
                Control0..1
                This element is affected by the following invariants: ele-1
                Typeidstring
                Is Modifierfalse
                XML FormatIn the XML format, this property is represented as an attribute.
                Summaryfalse
                96. SymptomLogicalModel.keyFeatures.surroundingEvents.triggers.extension
                Definition

                May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

                ShortAdditional content defined by implementations
                Comments

                There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                Control0..*
                TypeExtension
                Is Modifierfalse
                Summaryfalse
                Alternate Namesextensions, user content
                Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
                SlicingThis element introduces a set of slices on SymptomLogicalModel.keyFeatures.surroundingEvents.triggers.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
                • value @ url
                • 98. SymptomLogicalModel.keyFeatures.surroundingEvents.triggers.modifierExtension
                  Definition

                  May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

                  Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

                  ShortExtensions that cannot be ignored even if unrecognized
                  Comments

                  There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                  Control0..*
                  TypeExtension
                  Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
                  Summarytrue
                  Requirements

                  Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

                  Alternate Namesextensions, user content, modifiers
                  Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                  ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
                  100. SymptomLogicalModel.keyFeatures.surroundingEvents.triggers.triggerCode
                  Definition

                  Code describing the type of trigger

                  ShortCode describing the type of trigger
                  Control1..1
                  TypeCodeableConcept
                  102. SymptomLogicalModel.keyFeatures.surroundingEvents.triggers.note
                  Definition

                  Free text related to the observation

                  ShortFree text related to the observation
                  Control0..1
                  TypeAnnotation
                  104. SymptomLogicalModel.keyFeatures.surroundingEvents.exacerbatingFactors
                  Definition

                  Patient reported actions, conditions, events, physical objects or other factors that increase or worsen symptoms or the condition of interest (pain, nausea, dyspnea, dizziness, or other).

                  Control0..*
                  TypeBackboneElement
                  Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                  106. SymptomLogicalModel.keyFeatures.surroundingEvents.exacerbatingFactors.id
                  Definition

                  Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

                  ShortUnique id for inter-element referencing
                  Control0..1
                  This element is affected by the following invariants: ele-1
                  Typeidstring
                  Is Modifierfalse
                  XML FormatIn the XML format, this property is represented as an attribute.
                  Summaryfalse
                  108. SymptomLogicalModel.keyFeatures.surroundingEvents.exacerbatingFactors.extension
                  Definition

                  May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

                  ShortAdditional content defined by implementations
                  Comments

                  There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                  Control0..*
                  TypeExtension
                  Is Modifierfalse
                  Summaryfalse
                  Alternate Namesextensions, user content
                  Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                  ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
                  SlicingThis element introduces a set of slices on SymptomLogicalModel.keyFeatures.surroundingEvents.exacerbatingFactors.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
                  • value @ url
                  • 110. SymptomLogicalModel.keyFeatures.surroundingEvents.exacerbatingFactors.modifierExtension
                    Definition

                    May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

                    Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

                    ShortExtensions that cannot be ignored even if unrecognized
                    Comments

                    There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                    Control0..*
                    TypeExtension
                    Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
                    Summarytrue
                    Requirements

                    Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

                    Alternate Namesextensions, user content, modifiers
                    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                    ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
                    112. SymptomLogicalModel.keyFeatures.surroundingEvents.exacerbatingFactors.factor
                    Definition

                    Reference to the factor

                    ShortReference to the factor
                    Control1..1
                    TypeCodeableConcept
                    114. SymptomLogicalModel.keyFeatures.surroundingEvents.exacerbatingFactors.relatedMedication
                    Control0..*
                    TypeMedication
                    116. SymptomLogicalModel.keyFeatures.surroundingEvents.exacerbatingFactors.note
                    Definition

                    Information given about actions, conditions, events, or other factors

                    ShortInformation given about actions, conditions, events, or other factors
                    Control0..1
                    TypeAnnotation
                    118. SymptomLogicalModel.keyFeatures.surroundingEvents.alleviatingFactors
                    Definition

                    Patient-reported actions, conditions, events, or other factors that decrease the symptoms or condition

                    Control0..*
                    TypeBackboneElement
                    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                    120. SymptomLogicalModel.keyFeatures.surroundingEvents.alleviatingFactors.id
                    Definition

                    Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

                    ShortUnique id for inter-element referencing
                    Control0..1
                    This element is affected by the following invariants: ele-1
                    Typeidstring
                    Is Modifierfalse
                    XML FormatIn the XML format, this property is represented as an attribute.
                    Summaryfalse
                    122. SymptomLogicalModel.keyFeatures.surroundingEvents.alleviatingFactors.extension
                    Definition

                    May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

                    ShortAdditional content defined by implementations
                    Comments

                    There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                    Control0..*
                    TypeExtension
                    Is Modifierfalse
                    Summaryfalse
                    Alternate Namesextensions, user content
                    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                    ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
                    SlicingThis element introduces a set of slices on SymptomLogicalModel.keyFeatures.surroundingEvents.alleviatingFactors.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
                    • value @ url
                    • 124. SymptomLogicalModel.keyFeatures.surroundingEvents.alleviatingFactors.modifierExtension
                      Definition

                      May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

                      Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

                      ShortExtensions that cannot be ignored even if unrecognized
                      Comments

                      There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                      Control0..*
                      TypeExtension
                      Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
                      Summarytrue
                      Requirements

                      Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

                      Alternate Namesextensions, user content, modifiers
                      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                      ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
                      126. SymptomLogicalModel.keyFeatures.surroundingEvents.alleviatingFactors.factor
                      Definition

                      Reference to the factor

                      ShortReference to the factor
                      Control1..1
                      TypeCodeableConcept
                      128. SymptomLogicalModel.keyFeatures.surroundingEvents.alleviatingFactors.note
                      Definition

                      Information given about actions, conditions, events, or other factors

                      ShortInformation given about actions, conditions, events, or other factors
                      Control0..1
                      TypeAnnotation
                      130. SymptomLogicalModel.keyFeatures.surroundingEvents.alleviatingFactors.relatedMedication
                      Control0..*
                      TypeMedication
                      132. SymptomLogicalModel.keyFeatures.surroundingEvents.otherEvents
                      Definition

                      Patient-reported actions that were occuring at time of symptom onset

                      ShortPatient-reported actions that were occuring at time of symptom onset
                      Control0..*
                      TypeCodeableConcept
                      134. SymptomLogicalModel.timing
                      Definition

                      Timing includes the actual or estimated date/time of onset, character of onset, how often the patient experiences the symptom, and the length of time the symptom persists.

                      Control0..1
                      TypeBackboneElement
                      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                      136. SymptomLogicalModel.timing.id
                      Definition

                      Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

                      ShortUnique id for inter-element referencing
                      Control0..1
                      This element is affected by the following invariants: ele-1
                      Typeidstring
                      Is Modifierfalse
                      XML FormatIn the XML format, this property is represented as an attribute.
                      Summaryfalse
                      138. SymptomLogicalModel.timing.extension
                      Definition

                      May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

                      ShortAdditional content defined by implementations
                      Comments

                      There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                      Control0..*
                      TypeExtension
                      Is Modifierfalse
                      Summaryfalse
                      Alternate Namesextensions, user content
                      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                      ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
                      SlicingThis element introduces a set of slices on SymptomLogicalModel.timing.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
                      • value @ url
                      • 140. SymptomLogicalModel.timing.modifierExtension
                        Definition

                        May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

                        Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

                        ShortExtensions that cannot be ignored even if unrecognized
                        Comments

                        There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                        Control0..*
                        TypeExtension
                        Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
                        Summarytrue
                        Requirements

                        Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

                        Alternate Namesextensions, user content, modifiers
                        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                        ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
                        142. SymptomLogicalModel.timing.speed
                        Definition

                        The rate at which a physiological condition became apparent.

                        ShortThe rate at which a physiological condition became apparent.
                        Control0..1
                        TypeCodeableConcept
                        144. SymptomLogicalModel.timing.onset[x]
                        Definition

                        Clinically relevant time or period for the symptom since first occurance.

                        ShortClinically relevant time or period for the symptom since first occurance.
                        Control0..1
                        TypeChoice of: dateTime, Period
                        [x] NoteSeeChoice of Data Typesfor further information about how to use [x]
                        Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                        146. SymptomLogicalModel.timing.note
                        Definition

                        Free text related to the observation

                        ShortFree text related to the observation
                        Control0..1
                        TypeAnnotation
                        148. SymptomLogicalModel.timing.duration[x]
                        Definition

                        The length of time the symptom persists in this instance of occurance.

                        ShortThe length of time the symptom persists in this instance of occurance.
                        Control0..1
                        TypeChoice of: Duration, CodeableConcept
                        [x] NoteSeeChoice of Data Typesfor further information about how to use [x]
                        150. SymptomLogicalModel.timing.frequency
                        Definition

                        How often the patient experiences the symptom.

                        ShortHow often the patient experiences the symptom.
                        Control0..1
                        TypeQuantity
                        152. SymptomLogicalModel.timing.timePattern
                        Definition

                        Continuous, intermittent, paroxysmal, or cyclic

                        ShortThe pattern of experiencing the symptom
                        Control0..1
                        TypeCodeableConcept
                        154. SymptomLogicalModel.clinicalCourse
                        Definition

                        Term to represent both the course and onset of a disease. Many conditions with an acute (sudden) onset also have an acute (short duration) course.

                        ShortCharacter of symptom onset.
                        Control0..1
                        TypeCodeableConcept
                        156. SymptomLogicalModel.trend
                        Definition

                        Whether a condition is improving, worsening, stable, or resolved.

                        ShortIntensity of symptom over time
                        Control0..1
                        TypeCodeableConcept
                        158. SymptomLogicalModel.metadata
                        Definition

                        Non clinical information about the symptom

                        ShortNon clinical information about the symptom
                        Control1..1
                        TypeBackboneElement
                        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                        160. SymptomLogicalModel.metadata.id
                        Definition

                        Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

                        ShortUnique id for inter-element referencing
                        Control0..1
                        This element is affected by the following invariants: ele-1
                        Typeidstring
                        Is Modifierfalse
                        XML FormatIn the XML format, this property is represented as an attribute.
                        Summaryfalse
                        162. SymptomLogicalModel.metadata.extension
                        Definition

                        May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

                        ShortAdditional content defined by implementations
                        Comments

                        There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                        Control0..*
                        TypeExtension
                        Is Modifierfalse
                        Summaryfalse
                        Alternate Namesextensions, user content
                        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                        ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
                        SlicingThis element introduces a set of slices on SymptomLogicalModel.metadata.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
                        • value @ url
                        • 164. SymptomLogicalModel.metadata.modifierExtension
                          Definition

                          May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

                          Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

                          ShortExtensions that cannot be ignored even if unrecognized
                          Comments

                          There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                          Control0..*
                          TypeExtension
                          Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
                          Summarytrue
                          Requirements

                          Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

                          Alternate Namesextensions, user content, modifiers
                          Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                          ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
                          166. SymptomLogicalModel.metadata.documentationDate
                          Definition

                          The date the symptom was entered, edited, or deleted.

                          ShortDate of recorded visit
                          Control1..1
                          TypedateTime
                          Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                          168. SymptomLogicalModel.metadata.issued
                          Definition

                          Date/time when the current version was made available.

                          ShortDate/time when the current version was made available.
                          Control1..1
                          TypedateTime
                          Primitive ValueThis primitive element may be present, or absent, or replaced by an extension

                          Guidance on how to interpret the contents of this table can be foundhere

                          0. SymptomLogicalModel
                          Definition

                          Details about the Symptom.

                          ShortSymptom Logical Model
                          Logical ModelInstances of this logical model are not marked to be the target of a Reference
                          2. SymptomLogicalModel.identifier
                          Definition

                          A unique string that identifies this instance of a symptom

                          ShortA unique string that identifies this instance of a symptom
                          NoteThis is a business identifier, not a resource identifier (see discussion)
                          Control1..1
                          Typestring
                          Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                          4. SymptomLogicalModel.symptomCode
                          Definition

                          Coded description of symptom

                          ShortCoded description of symptom
                          Control1..1
                          TypeCodeableConcept
                          6. SymptomLogicalModel.affectedPatient
                          Definition

                          The patient who is experiencing the symptom

                          ShortThe patient who is experiencing the symptom
                          Control1..1
                          TypePatient
                          8. SymptomLogicalModel.reporter[x]
                          Definition

                          The person who is reporting the symptom information

                          ShortThe person who is reporting the symptom information
                          Control1..1
                          TypeChoice of: Patient, RelatedPerson
                          [x] NoteSeeChoice of Data Typesfor further information about how to use [x]
                          10. SymptomLogicalModel.symptomDescription
                          Definition

                          Textual description of symptom as provided by patient or care team member

                          ShortTextual description of symptom as provided by patient or care team member
                          Control0..*
                          TypeAnnotation
                          12. SymptomLogicalModel.location
                          Definition

                          Where the patient feels the symptom in the body.

                          ShortWhere the patient feels the symptom in the body.
                          Control0..*
                          TypeBodyStructure
                          14. SymptomLogicalModel.associatedSymptoms
                          Definition

                          Other symptoms associated with this symptom

                          ShortOther symptoms associated with this symptom
                          Control0..*
                          Typehttp://hl7.org/fhir/uv/symptoms/StructureDefinition/SymptomLogicalModel
                          16. SymptomLogicalModel.associatedConditions
                          Definition

                          Condition associated with this symptom

                          ShortCondition associated with this symptom
                          Control0..*
                          TypeCondition
                          18. SymptomLogicalModel.keyFeatures
                          Definition

                          The key features of the symptom

                          ShortKey Features
                          Control1..1
                          TypeBackboneElement
                          20. SymptomLogicalModel.keyFeatures.quality
                          Definition

                          The patient's internal perception of the symptom.

                          ShortThe patient's internal perception of the symptom.
                          Control0..1
                          TypeBackboneElement
                          22. SymptomLogicalModel.keyFeatures.quality.note
                          Definition

                          Textual description of the symptom quality

                          ShortTextual description of the symptom quality
                          Control0..1
                          TypeAnnotation
                          24. SymptomLogicalModel.keyFeatures.quality.scaleCode
                          Definition

                          Code for the specific scale or assessment (if any) used to determine the quality

                          ShortCode for the specific scale or assessment (if any) used to determine the quality
                          Control0..1
                          Typecode
                          Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                          26. SymptomLogicalModel.keyFeatures.quality.value
                          Definition

                          Code that represents the symptom quality

                          ShortCode that represents the symptom quality
                          Control1..1
                          TypeCodeableConcept
                          28. SymptomLogicalModel.keyFeatures.severity
                          Definition

                          The intensity with which the patient experiences the symptom.

                          ShortThe intensity with which the patient experiences the symptom.
                          Control0..1
                          TypeBackboneElement
                          30. SymptomLogicalModel.keyFeatures.severity.note
                          Definition

                          Textual description of the symptom severity

                          ShortTextual description of the symptom severity
                          Control0..1
                          TypeAnnotation
                          32. SymptomLogicalModel.keyFeatures.severity.scaleCode
                          Definition

                          Code for the specific scale or assessment if any used to determine the severity

                          ShortCode for the specific scale or assessment if any used to determine the severity
                          Control0..1
                          Typecode
                          Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                          34. SymptomLogicalModel.keyFeatures.severity.value
                          Definition

                          Code that represents the symptom severity

                          ShortCode that represents the symptom severity
                          Control1..1
                          TypeCodeableConcept
                          36. SymptomLogicalModel.keyFeatures.functionalImpact
                          Definition

                          How the symptom affects the patient's daily activities.

                          ShortHow the symptom affects the patient's daily activities.
                          Control0..1
                          TypeBackboneElement
                          38. SymptomLogicalModel.keyFeatures.functionalImpact.note
                          Definition

                          Textual description of the impact

                          ShortTextual description of the impact
                          Control0..1
                          TypeAnnotation
                          40. SymptomLogicalModel.keyFeatures.functionalImpact.scaleCode
                          Definition

                          Code for the specific scale or assessment (if any) used to determine the impact

                          ShortCode for the specific scale or assessment (if any) used to determine the impact
                          Control0..1
                          Typecode
                          Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                          42. SymptomLogicalModel.keyFeatures.functionalImpact.value
                          Definition

                          Code that represents the functional impact

                          ShortCode that represents the functional impact
                          Control1..1
                          TypeCodeableConcept
                          44. SymptomLogicalModel.keyFeatures.affectiveGrade
                          Definition

                          Emotional or mental impact of a symptom.

                          ShortEmotional or mental impact of a symptom.
                          Control0..1
                          TypeBackboneElement
                          46. SymptomLogicalModel.keyFeatures.affectiveGrade.note
                          Definition

                          Textual description of the grade

                          ShortTextual description of the grade
                          Control0..1
                          TypeAnnotation
                          48. SymptomLogicalModel.keyFeatures.affectiveGrade.value
                          Definition

                          Code that represents the affective grade

                          ShortCode that represents the affective grade
                          Control1..1
                          TypeCodeableConcept
                          50. SymptomLogicalModel.keyFeatures.surroundingEvents
                          Definition

                          What was occurring at the time of symptom onset.

                          ShortWhat was occurring at the time of symptom onset.
                          Control0..1
                          TypeBackboneElement
                          52. SymptomLogicalModel.keyFeatures.surroundingEvents.triggers
                          Definition

                          Actions or environments that initiate the symptom.

                          ShortActions or environments that initiate the symptom.
                          Control0..*
                          TypeBackboneElement
                          54. SymptomLogicalModel.keyFeatures.surroundingEvents.triggers.triggerCode
                          Definition

                          Code describing the type of trigger

                          ShortCode describing the type of trigger
                          Control1..1
                          TypeCodeableConcept
                          56. SymptomLogicalModel.keyFeatures.surroundingEvents.triggers.note
                          Definition

                          Free text related to the observation

                          ShortFree text related to the observation
                          Control0..1
                          TypeAnnotation
                          58. SymptomLogicalModel.keyFeatures.surroundingEvents.exacerbatingFactors
                          Definition

                          Patient reported actions, conditions, events, physical objects or other factors that increase or worsen symptoms or the condition of interest (pain, nausea, dyspnea, dizziness, or other).

                          Control0..*
                          TypeBackboneElement
                          60. SymptomLogicalModel.keyFeatures.surroundingEvents.exacerbatingFactors.factor
                          Definition

                          Reference to the factor

                          ShortReference to the factor
                          Control1..1
                          TypeCodeableConcept
                          62. SymptomLogicalModel.keyFeatures.surroundingEvents.exacerbatingFactors.relatedMedication
                          Control0..*
                          TypeMedication
                          64. SymptomLogicalModel.keyFeatures.surroundingEvents.exacerbatingFactors.note
                          Definition

                          Information given about actions, conditions, events, or other factors

                          ShortInformation given about actions, conditions, events, or other factors
                          Control0..1
                          TypeAnnotation
                          66. SymptomLogicalModel.keyFeatures.surroundingEvents.alleviatingFactors
                          Definition

                          Patient-reported actions, conditions, events, or other factors that decrease the symptoms or condition

                          Control0..*
                          TypeBackboneElement
                          68. SymptomLogicalModel.keyFeatures.surroundingEvents.alleviatingFactors.factor
                          Definition

                          Reference to the factor

                          ShortReference to the factor
                          Control1..1
                          TypeCodeableConcept
                          70. SymptomLogicalModel.keyFeatures.surroundingEvents.alleviatingFactors.note
                          Definition

                          Information given about actions, conditions, events, or other factors

                          ShortInformation given about actions, conditions, events, or other factors
                          Control0..1
                          TypeAnnotation
                          72. SymptomLogicalModel.keyFeatures.surroundingEvents.alleviatingFactors.relatedMedication
                          Control0..*
                          TypeMedication
                          74. SymptomLogicalModel.keyFeatures.surroundingEvents.otherEvents
                          Definition

                          Patient-reported actions that were occuring at time of symptom onset

                          ShortPatient-reported actions that were occuring at time of symptom onset
                          Control0..*
                          TypeCodeableConcept
                          76. SymptomLogicalModel.timing
                          Definition

                          Timing includes the actual or estimated date/time of onset, character of onset, how often the patient experiences the symptom, and the length of time the symptom persists.

                          Control0..1
                          TypeBackboneElement
                          78. SymptomLogicalModel.timing.speed
                          Definition

                          The rate at which a physiological condition became apparent.

                          ShortThe rate at which a physiological condition became apparent.
                          Control0..1
                          TypeCodeableConcept
                          80. SymptomLogicalModel.timing.onset[x]
                          Definition

                          Clinically relevant time or period for the symptom since first occurance.

                          ShortClinically relevant time or period for the symptom since first occurance.
                          Control0..1
                          TypeChoice of: dateTime, Period
                          [x] NoteSeeChoice of Data Typesfor further information about how to use [x]
                          Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                          82. SymptomLogicalModel.timing.note
                          Definition

                          Free text related to the observation

                          ShortFree text related to the observation
                          Control0..1
                          TypeAnnotation
                          84. SymptomLogicalModel.timing.duration[x]
                          Definition

                          The length of time the symptom persists in this instance of occurance.

                          ShortThe length of time the symptom persists in this instance of occurance.
                          Control0..1
                          TypeChoice of: Duration, CodeableConcept
                          [x] NoteSeeChoice of Data Typesfor further information about how to use [x]
                          86. SymptomLogicalModel.timing.frequency
                          Definition

                          How often the patient experiences the symptom.

                          ShortHow often the patient experiences the symptom.
                          Control0..1
                          TypeQuantity
                          88. SymptomLogicalModel.timing.timePattern
                          Definition

                          Continuous, intermittent, paroxysmal, or cyclic

                          ShortThe pattern of experiencing the symptom
                          Control0..1
                          TypeCodeableConcept
                          90. SymptomLogicalModel.clinicalCourse
                          Definition

                          Term to represent both the course and onset of a disease. Many conditions with an acute (sudden) onset also have an acute (short duration) course.

                          ShortCharacter of symptom onset.
                          Control0..1
                          TypeCodeableConcept
                          92. SymptomLogicalModel.trend
                          Definition

                          Whether a condition is improving, worsening, stable, or resolved.

                          ShortIntensity of symptom over time
                          Control0..1
                          TypeCodeableConcept
                          94. SymptomLogicalModel.metadata
                          Definition

                          Non clinical information about the symptom

                          ShortNon clinical information about the symptom
                          Control1..1
                          TypeBackboneElement
                          96. SymptomLogicalModel.metadata.documentationDate
                          Definition

                          The date the symptom was entered, edited, or deleted.

                          ShortDate of recorded visit
                          Control1..1
                          TypedateTime
                          Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                          98. SymptomLogicalModel.metadata.issued
                          Definition

                          Date/time when the current version was made available.

                          ShortDate/time when the current version was made available.
                          Control1..1
                          TypedateTime
                          Primitive ValueThis primitive element may be present, or absent, or replaced by an extension

                          Guidance on how to interpret the contents of this table can be foundhere

                          0. SymptomLogicalModel
                          Definition

                          Details about the Symptom.

                          ShortSymptom Logical Model
                          Control0..*
                          Is Modifierfalse
                          Logical ModelInstances of this logical model are not marked to be the target of a Reference
                          Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                          2. SymptomLogicalModel.id
                          Definition

                          Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

                          ShortUnique id for inter-element referencing
                          Control0..1
                          This element is affected by the following invariants: ele-1
                          Typestring
                          Is Modifierfalse
                          XML FormatIn the XML format, this property is represented as an attribute.
                          Summaryfalse
                          4. SymptomLogicalModel.extension
                          Definition

                          May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

                          ShortAdditional content defined by implementations
                          Comments

                          There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                          Control0..*
                          TypeExtension
                          Is Modifierfalse
                          Summaryfalse
                          Alternate Namesextensions, user content
                          Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                          ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
                          SlicingThis element introduces a set of slices on SymptomLogicalModel.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
                          • value @ url
                          • 6. SymptomLogicalModel.identifier
                            Definition

                            A unique string that identifies this instance of a symptom

                            ShortA unique string that identifies this instance of a symptom
                            NoteThis is a business identifier, not a resource identifier (see discussion)
                            Control1..1
                            Typestring
                            Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                            8. SymptomLogicalModel.symptomCode
                            Definition

                            Coded description of symptom

                            ShortCoded description of symptom
                            Control1..1
                            TypeCodeableConcept
                            10. SymptomLogicalModel.affectedPatient
                            Definition

                            The patient who is experiencing the symptom

                            ShortThe patient who is experiencing the symptom
                            Control1..1
                            TypePatient
                            12. SymptomLogicalModel.reporter[x]
                            Definition

                            The person who is reporting the symptom information

                            ShortThe person who is reporting the symptom information
                            Control1..1
                            TypeChoice of: Patient, RelatedPerson
                            [x] NoteSeeChoice of Data Typesfor further information about how to use [x]
                            14. SymptomLogicalModel.symptomDescription
                            Definition

                            Textual description of symptom as provided by patient or care team member

                            ShortTextual description of symptom as provided by patient or care team member
                            Control0..*
                            TypeAnnotation
                            16. SymptomLogicalModel.location
                            Definition

                            Where the patient feels the symptom in the body.

                            ShortWhere the patient feels the symptom in the body.
                            Control0..*
                            TypeBodyStructure
                            18. SymptomLogicalModel.associatedSymptoms
                            Definition

                            Other symptoms associated with this symptom

                            ShortOther symptoms associated with this symptom
                            Control0..*
                            Typehttp://hl7.org/fhir/uv/symptoms/StructureDefinition/SymptomLogicalModel
                            20. SymptomLogicalModel.associatedConditions
                            Definition

                            Condition associated with this symptom

                            ShortCondition associated with this symptom
                            Control0..*
                            TypeCondition
                            22. SymptomLogicalModel.keyFeatures
                            Definition

                            The key features of the symptom

                            ShortKey Features
                            Control1..1
                            TypeBackboneElement
                            Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                            24. SymptomLogicalModel.keyFeatures.id
                            Definition

                            Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

                            ShortUnique id for inter-element referencing
                            Control0..1
                            This element is affected by the following invariants: ele-1
                            Typeid
                            Is Modifierfalse
                            XML FormatIn the XML format, this property is represented as an attribute.
                            Summaryfalse
                            26. SymptomLogicalModel.keyFeatures.extension
                            Definition

                            May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

                            ShortAdditional content defined by implementations
                            Comments

                            There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                            Control0..*
                            TypeExtension
                            Is Modifierfalse
                            Summaryfalse
                            Alternate Namesextensions, user content
                            Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                            ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
                            SlicingThis element introduces a set of slices on SymptomLogicalModel.keyFeatures.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
                            • value @ url
                            • 28. SymptomLogicalModel.keyFeatures.modifierExtension
                              Definition

                              May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

                              Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

                              ShortExtensions that cannot be ignored even if unrecognized
                              Comments

                              There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                              Control0..*
                              TypeExtension
                              Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
                              Summarytrue
                              Requirements

                              Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

                              Alternate Namesextensions, user content, modifiers
                              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                              ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
                              30. SymptomLogicalModel.keyFeatures.quality
                              Definition

                              The patient's internal perception of the symptom.

                              ShortThe patient's internal perception of the symptom.
                              Control0..1
                              TypeBackboneElement
                              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                              32. SymptomLogicalModel.keyFeatures.quality.id
                              Definition

                              Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

                              ShortUnique id for inter-element referencing
                              Control0..1
                              This element is affected by the following invariants: ele-1
                              Typeid
                              Is Modifierfalse
                              XML FormatIn the XML format, this property is represented as an attribute.
                              Summaryfalse
                              34. SymptomLogicalModel.keyFeatures.quality.extension
                              Definition

                              May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

                              ShortAdditional content defined by implementations
                              Comments

                              There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                              Control0..*
                              TypeExtension
                              Is Modifierfalse
                              Summaryfalse
                              Alternate Namesextensions, user content
                              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                              ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
                              SlicingThis element introduces a set of slices on SymptomLogicalModel.keyFeatures.quality.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
                              • value @ url
                              • 36. SymptomLogicalModel.keyFeatures.quality.modifierExtension
                                Definition

                                May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

                                Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

                                ShortExtensions that cannot be ignored even if unrecognized
                                Comments

                                There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                                Control0..*
                                TypeExtension
                                Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
                                Summarytrue
                                Requirements

                                Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

                                Alternate Namesextensions, user content, modifiers
                                Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                                ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
                                38. SymptomLogicalModel.keyFeatures.quality.note
                                Definition

                                Textual description of the symptom quality

                                ShortTextual description of the symptom quality
                                Control0..1
                                TypeAnnotation
                                40. SymptomLogicalModel.keyFeatures.quality.scaleCode
                                Definition

                                Code for the specific scale or assessment (if any) used to determine the quality

                                ShortCode for the specific scale or assessment (if any) used to determine the quality
                                Control0..1
                                Typecode
                                Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                                42. SymptomLogicalModel.keyFeatures.quality.value
                                Definition

                                Code that represents the symptom quality

                                ShortCode that represents the symptom quality
                                Control1..1
                                TypeCodeableConcept
                                44. SymptomLogicalModel.keyFeatures.severity
                                Definition

                                The intensity with which the patient experiences the symptom.

                                ShortThe intensity with which the patient experiences the symptom.
                                Control0..1
                                TypeBackboneElement
                                Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                                46. SymptomLogicalModel.keyFeatures.severity.id
                                Definition

                                Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

                                ShortUnique id for inter-element referencing
                                Control0..1
                                This element is affected by the following invariants: ele-1
                                Typeid
                                Is Modifierfalse
                                XML FormatIn the XML format, this property is represented as an attribute.
                                Summaryfalse
                                48. SymptomLogicalModel.keyFeatures.severity.extension
                                Definition

                                May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

                                ShortAdditional content defined by implementations
                                Comments

                                There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                                Control0..*
                                TypeExtension
                                Is Modifierfalse
                                Summaryfalse
                                Alternate Namesextensions, user content
                                Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                                ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
                                SlicingThis element introduces a set of slices on SymptomLogicalModel.keyFeatures.severity.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
                                • value @ url
                                • 50. SymptomLogicalModel.keyFeatures.severity.modifierExtension
                                  Definition

                                  May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

                                  Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

                                  ShortExtensions that cannot be ignored even if unrecognized
                                  Comments

                                  There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                                  Control0..*
                                  TypeExtension
                                  Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
                                  Summarytrue
                                  Requirements

                                  Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

                                  Alternate Namesextensions, user content, modifiers
                                  Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                                  ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
                                  52. SymptomLogicalModel.keyFeatures.severity.note
                                  Definition

                                  Textual description of the symptom severity

                                  ShortTextual description of the symptom severity
                                  Control0..1
                                  TypeAnnotation
                                  54. SymptomLogicalModel.keyFeatures.severity.scaleCode
                                  Definition

                                  Code for the specific scale or assessment if any used to determine the severity

                                  ShortCode for the specific scale or assessment if any used to determine the severity
                                  Control0..1
                                  Typecode
                                  Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                                  56. SymptomLogicalModel.keyFeatures.severity.value
                                  Definition

                                  Code that represents the symptom severity

                                  ShortCode that represents the symptom severity
                                  Control1..1
                                  TypeCodeableConcept
                                  58. SymptomLogicalModel.keyFeatures.functionalImpact
                                  Definition

                                  How the symptom affects the patient's daily activities.

                                  ShortHow the symptom affects the patient's daily activities.
                                  Control0..1
                                  TypeBackboneElement
                                  Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                                  60. SymptomLogicalModel.keyFeatures.functionalImpact.id
                                  Definition

                                  Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

                                  ShortUnique id for inter-element referencing
                                  Control0..1
                                  This element is affected by the following invariants: ele-1
                                  Typeid
                                  Is Modifierfalse
                                  XML FormatIn the XML format, this property is represented as an attribute.
                                  Summaryfalse
                                  62. SymptomLogicalModel.keyFeatures.functionalImpact.extension
                                  Definition

                                  May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

                                  ShortAdditional content defined by implementations
                                  Comments

                                  There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                                  Control0..*
                                  TypeExtension
                                  Is Modifierfalse
                                  Summaryfalse
                                  Alternate Namesextensions, user content
                                  Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                                  ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
                                  SlicingThis element introduces a set of slices on SymptomLogicalModel.keyFeatures.functionalImpact.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
                                  • value @ url
                                  • 64. SymptomLogicalModel.keyFeatures.functionalImpact.modifierExtension
                                    Definition

                                    May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

                                    Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

                                    ShortExtensions that cannot be ignored even if unrecognized
                                    Comments

                                    There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                                    Control0..*
                                    TypeExtension
                                    Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
                                    Summarytrue
                                    Requirements

                                    Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

                                    Alternate Namesextensions, user content, modifiers
                                    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                                    ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
                                    66. SymptomLogicalModel.keyFeatures.functionalImpact.note
                                    Definition

                                    Textual description of the impact

                                    ShortTextual description of the impact
                                    Control0..1
                                    TypeAnnotation
                                    68. SymptomLogicalModel.keyFeatures.functionalImpact.scaleCode
                                    Definition

                                    Code for the specific scale or assessment (if any) used to determine the impact

                                    ShortCode for the specific scale or assessment (if any) used to determine the impact
                                    Control0..1
                                    Typecode
                                    Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                                    70. SymptomLogicalModel.keyFeatures.functionalImpact.value
                                    Definition

                                    Code that represents the functional impact

                                    ShortCode that represents the functional impact
                                    Control1..1
                                    TypeCodeableConcept
                                    72. SymptomLogicalModel.keyFeatures.affectiveGrade
                                    Definition

                                    Emotional or mental impact of a symptom.

                                    ShortEmotional or mental impact of a symptom.
                                    Control0..1
                                    TypeBackboneElement
                                    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                                    74. SymptomLogicalModel.keyFeatures.affectiveGrade.id
                                    Definition

                                    Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

                                    ShortUnique id for inter-element referencing
                                    Control0..1
                                    This element is affected by the following invariants: ele-1
                                    Typeid
                                    Is Modifierfalse
                                    XML FormatIn the XML format, this property is represented as an attribute.
                                    Summaryfalse
                                    76. SymptomLogicalModel.keyFeatures.affectiveGrade.extension
                                    Definition

                                    May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

                                    ShortAdditional content defined by implementations
                                    Comments

                                    There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                                    Control0..*
                                    TypeExtension
                                    Is Modifierfalse
                                    Summaryfalse
                                    Alternate Namesextensions, user content
                                    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                                    ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
                                    SlicingThis element introduces a set of slices on SymptomLogicalModel.keyFeatures.affectiveGrade.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
                                    • value @ url
                                    • 78. SymptomLogicalModel.keyFeatures.affectiveGrade.modifierExtension
                                      Definition

                                      May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

                                      Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

                                      ShortExtensions that cannot be ignored even if unrecognized
                                      Comments

                                      There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                                      Control0..*
                                      TypeExtension
                                      Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
                                      Summarytrue
                                      Requirements

                                      Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

                                      Alternate Namesextensions, user content, modifiers
                                      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                                      ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
                                      80. SymptomLogicalModel.keyFeatures.affectiveGrade.note
                                      Definition

                                      Textual description of the grade

                                      ShortTextual description of the grade
                                      Control0..1
                                      TypeAnnotation
                                      82. SymptomLogicalModel.keyFeatures.affectiveGrade.value
                                      Definition

                                      Code that represents the affective grade

                                      ShortCode that represents the affective grade
                                      Control1..1
                                      TypeCodeableConcept
                                      84. SymptomLogicalModel.keyFeatures.surroundingEvents
                                      Definition

                                      What was occurring at the time of symptom onset.

                                      ShortWhat was occurring at the time of symptom onset.
                                      Control0..1
                                      TypeBackboneElement
                                      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                                      86. SymptomLogicalModel.keyFeatures.surroundingEvents.id
                                      Definition

                                      Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

                                      ShortUnique id for inter-element referencing
                                      Control0..1
                                      This element is affected by the following invariants: ele-1
                                      Typeid
                                      Is Modifierfalse
                                      XML FormatIn the XML format, this property is represented as an attribute.
                                      Summaryfalse
                                      88. SymptomLogicalModel.keyFeatures.surroundingEvents.extension
                                      Definition

                                      May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

                                      ShortAdditional content defined by implementations
                                      Comments

                                      There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                                      Control0..*
                                      TypeExtension
                                      Is Modifierfalse
                                      Summaryfalse
                                      Alternate Namesextensions, user content
                                      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                                      ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
                                      SlicingThis element introduces a set of slices on SymptomLogicalModel.keyFeatures.surroundingEvents.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
                                      • value @ url
                                      • 90. SymptomLogicalModel.keyFeatures.surroundingEvents.modifierExtension
                                        Definition

                                        May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

                                        Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

                                        ShortExtensions that cannot be ignored even if unrecognized
                                        Comments

                                        There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                                        Control0..*
                                        TypeExtension
                                        Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
                                        Summarytrue
                                        Requirements

                                        Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

                                        Alternate Namesextensions, user content, modifiers
                                        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                                        ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
                                        92. SymptomLogicalModel.keyFeatures.surroundingEvents.triggers
                                        Definition

                                        Actions or environments that initiate the symptom.

                                        ShortActions or environments that initiate the symptom.
                                        Control0..*
                                        TypeBackboneElement
                                        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                                        94. SymptomLogicalModel.keyFeatures.surroundingEvents.triggers.id
                                        Definition

                                        Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

                                        ShortUnique id for inter-element referencing
                                        Control0..1
                                        This element is affected by the following invariants: ele-1
                                        Typeid
                                        Is Modifierfalse
                                        XML FormatIn the XML format, this property is represented as an attribute.
                                        Summaryfalse
                                        96. SymptomLogicalModel.keyFeatures.surroundingEvents.triggers.extension
                                        Definition

                                        May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

                                        ShortAdditional content defined by implementations
                                        Comments

                                        There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                                        Control0..*
                                        TypeExtension
                                        Is Modifierfalse
                                        Summaryfalse
                                        Alternate Namesextensions, user content
                                        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                                        ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
                                        SlicingThis element introduces a set of slices on SymptomLogicalModel.keyFeatures.surroundingEvents.triggers.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
                                        • value @ url
                                        • 98. SymptomLogicalModel.keyFeatures.surroundingEvents.triggers.modifierExtension
                                          Definition

                                          May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

                                          Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

                                          ShortExtensions that cannot be ignored even if unrecognized
                                          Comments

                                          There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                                          Control0..*
                                          TypeExtension
                                          Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
                                          Summarytrue
                                          Requirements

                                          Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

                                          Alternate Namesextensions, user content, modifiers
                                          Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                                          ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
                                          100. SymptomLogicalModel.keyFeatures.surroundingEvents.triggers.triggerCode
                                          Definition

                                          Code describing the type of trigger

                                          ShortCode describing the type of trigger
                                          Control1..1
                                          TypeCodeableConcept
                                          102. SymptomLogicalModel.keyFeatures.surroundingEvents.triggers.note
                                          Definition

                                          Free text related to the observation

                                          ShortFree text related to the observation
                                          Control0..1
                                          TypeAnnotation
                                          104. SymptomLogicalModel.keyFeatures.surroundingEvents.exacerbatingFactors
                                          Definition

                                          Patient reported actions, conditions, events, physical objects or other factors that increase or worsen symptoms or the condition of interest (pain, nausea, dyspnea, dizziness, or other).

                                          Control0..*
                                          TypeBackboneElement
                                          Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                                          106. SymptomLogicalModel.keyFeatures.surroundingEvents.exacerbatingFactors.id
                                          Definition

                                          Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

                                          ShortUnique id for inter-element referencing
                                          Control0..1
                                          This element is affected by the following invariants: ele-1
                                          Typeid
                                          Is Modifierfalse
                                          XML FormatIn the XML format, this property is represented as an attribute.
                                          Summaryfalse
                                          108. SymptomLogicalModel.keyFeatures.surroundingEvents.exacerbatingFactors.extension
                                          Definition

                                          May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

                                          ShortAdditional content defined by implementations
                                          Comments

                                          There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                                          Control0..*
                                          TypeExtension
                                          Is Modifierfalse
                                          Summaryfalse
                                          Alternate Namesextensions, user content
                                          Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                                          ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
                                          SlicingThis element introduces a set of slices on SymptomLogicalModel.keyFeatures.surroundingEvents.exacerbatingFactors.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
                                          • value @ url
                                          • 110. SymptomLogicalModel.keyFeatures.surroundingEvents.exacerbatingFactors.modifierExtension
                                            Definition

                                            May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

                                            Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

                                            ShortExtensions that cannot be ignored even if unrecognized
                                            Comments

                                            There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                                            Control0..*
                                            TypeExtension
                                            Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
                                            Summarytrue
                                            Requirements

                                            Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

                                            Alternate Namesextensions, user content, modifiers
                                            Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                                            ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
                                            112. SymptomLogicalModel.keyFeatures.surroundingEvents.exacerbatingFactors.factor
                                            Definition

                                            Reference to the factor

                                            ShortReference to the factor
                                            Control1..1
                                            TypeCodeableConcept
                                            114. SymptomLogicalModel.keyFeatures.surroundingEvents.exacerbatingFactors.relatedMedication
                                            Control0..*
                                            TypeMedication
                                            116. SymptomLogicalModel.keyFeatures.surroundingEvents.exacerbatingFactors.note
                                            Definition

                                            Information given about actions, conditions, events, or other factors

                                            ShortInformation given about actions, conditions, events, or other factors
                                            Control0..1
                                            TypeAnnotation
                                            118. SymptomLogicalModel.keyFeatures.surroundingEvents.alleviatingFactors
                                            Definition

                                            Patient-reported actions, conditions, events, or other factors that decrease the symptoms or condition

                                            Control0..*
                                            TypeBackboneElement
                                            Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                                            120. SymptomLogicalModel.keyFeatures.surroundingEvents.alleviatingFactors.id
                                            Definition

                                            Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

                                            ShortUnique id for inter-element referencing
                                            Control0..1
                                            This element is affected by the following invariants: ele-1
                                            Typeid
                                            Is Modifierfalse
                                            XML FormatIn the XML format, this property is represented as an attribute.
                                            Summaryfalse
                                            122. SymptomLogicalModel.keyFeatures.surroundingEvents.alleviatingFactors.extension
                                            Definition

                                            May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

                                            ShortAdditional content defined by implementations
                                            Comments

                                            There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                                            Control0..*
                                            TypeExtension
                                            Is Modifierfalse
                                            Summaryfalse
                                            Alternate Namesextensions, user content
                                            Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                                            ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
                                            SlicingThis element introduces a set of slices on SymptomLogicalModel.keyFeatures.surroundingEvents.alleviatingFactors.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
                                            • value @ url
                                            • 124. SymptomLogicalModel.keyFeatures.surroundingEvents.alleviatingFactors.modifierExtension
                                              Definition

                                              May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

                                              Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

                                              ShortExtensions that cannot be ignored even if unrecognized
                                              Comments

                                              There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                                              Control0..*
                                              TypeExtension
                                              Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
                                              Summarytrue
                                              Requirements

                                              Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

                                              Alternate Namesextensions, user content, modifiers
                                              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                                              ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
                                              126. SymptomLogicalModel.keyFeatures.surroundingEvents.alleviatingFactors.factor
                                              Definition

                                              Reference to the factor

                                              ShortReference to the factor
                                              Control1..1
                                              TypeCodeableConcept
                                              128. SymptomLogicalModel.keyFeatures.surroundingEvents.alleviatingFactors.note
                                              Definition

                                              Information given about actions, conditions, events, or other factors

                                              ShortInformation given about actions, conditions, events, or other factors
                                              Control0..1
                                              TypeAnnotation
                                              130. SymptomLogicalModel.keyFeatures.surroundingEvents.alleviatingFactors.relatedMedication
                                              Control0..*
                                              TypeMedication
                                              132. SymptomLogicalModel.keyFeatures.surroundingEvents.otherEvents
                                              Definition

                                              Patient-reported actions that were occuring at time of symptom onset

                                              ShortPatient-reported actions that were occuring at time of symptom onset
                                              Control0..*
                                              TypeCodeableConcept
                                              134. SymptomLogicalModel.timing
                                              Definition

                                              Timing includes the actual or estimated date/time of onset, character of onset, how often the patient experiences the symptom, and the length of time the symptom persists.

                                              Control0..1
                                              TypeBackboneElement
                                              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                                              136. SymptomLogicalModel.timing.id
                                              Definition

                                              Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

                                              ShortUnique id for inter-element referencing
                                              Control0..1
                                              This element is affected by the following invariants: ele-1
                                              Typeid
                                              Is Modifierfalse
                                              XML FormatIn the XML format, this property is represented as an attribute.
                                              Summaryfalse
                                              138. SymptomLogicalModel.timing.extension
                                              Definition

                                              May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

                                              ShortAdditional content defined by implementations
                                              Comments

                                              There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                                              Control0..*
                                              TypeExtension
                                              Is Modifierfalse
                                              Summaryfalse
                                              Alternate Namesextensions, user content
                                              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                                              ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
                                              SlicingThis element introduces a set of slices on SymptomLogicalModel.timing.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
                                              • value @ url
                                              • 140. SymptomLogicalModel.timing.modifierExtension
                                                Definition

                                                May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

                                                Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

                                                ShortExtensions that cannot be ignored even if unrecognized
                                                Comments

                                                There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                                                Control0..*
                                                TypeExtension
                                                Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
                                                Summarytrue
                                                Requirements

                                                Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

                                                Alternate Namesextensions, user content, modifiers
                                                Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                                                ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
                                                142. SymptomLogicalModel.timing.speed
                                                Definition

                                                The rate at which a physiological condition became apparent.

                                                ShortThe rate at which a physiological condition became apparent.
                                                Control0..1
                                                TypeCodeableConcept
                                                144. SymptomLogicalModel.timing.onset[x]
                                                Definition

                                                Clinically relevant time or period for the symptom since first occurance.

                                                ShortClinically relevant time or period for the symptom since first occurance.
                                                Control0..1
                                                TypeChoice of: dateTime, Period
                                                [x] NoteSeeChoice of Data Typesfor further information about how to use [x]
                                                Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                                                146. SymptomLogicalModel.timing.note
                                                Definition

                                                Free text related to the observation

                                                ShortFree text related to the observation
                                                Control0..1
                                                TypeAnnotation
                                                148. SymptomLogicalModel.timing.duration[x]
                                                Definition

                                                The length of time the symptom persists in this instance of occurance.

                                                ShortThe length of time the symptom persists in this instance of occurance.
                                                Control0..1
                                                TypeChoice of: Duration, CodeableConcept
                                                [x] NoteSeeChoice of Data Typesfor further information about how to use [x]
                                                150. SymptomLogicalModel.timing.frequency
                                                Definition

                                                How often the patient experiences the symptom.

                                                ShortHow often the patient experiences the symptom.
                                                Control0..1
                                                TypeQuantity
                                                152. SymptomLogicalModel.timing.timePattern
                                                Definition

                                                Continuous, intermittent, paroxysmal, or cyclic

                                                ShortThe pattern of experiencing the symptom
                                                Control0..1
                                                TypeCodeableConcept
                                                154. SymptomLogicalModel.clinicalCourse
                                                Definition

                                                Term to represent both the course and onset of a disease. Many conditions with an acute (sudden) onset also have an acute (short duration) course.

                                                ShortCharacter of symptom onset.
                                                Control0..1
                                                TypeCodeableConcept
                                                156. SymptomLogicalModel.trend
                                                Definition

                                                Whether a condition is improving, worsening, stable, or resolved.

                                                ShortIntensity of symptom over time
                                                Control0..1
                                                TypeCodeableConcept
                                                158. SymptomLogicalModel.metadata
                                                Definition

                                                Non clinical information about the symptom

                                                ShortNon clinical information about the symptom
                                                Control1..1
                                                TypeBackboneElement
                                                Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                                                160. SymptomLogicalModel.metadata.id
                                                Definition

                                                Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

                                                ShortUnique id for inter-element referencing
                                                Control0..1
                                                This element is affected by the following invariants: ele-1
                                                Typeid
                                                Is Modifierfalse
                                                XML FormatIn the XML format, this property is represented as an attribute.
                                                Summaryfalse
                                                162. SymptomLogicalModel.metadata.extension
                                                Definition

                                                May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

                                                ShortAdditional content defined by implementations
                                                Comments

                                                There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                                                Control0..*
                                                TypeExtension
                                                Is Modifierfalse
                                                Summaryfalse
                                                Alternate Namesextensions, user content
                                                Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                                                ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
                                                SlicingThis element introduces a set of slices on SymptomLogicalModel.metadata.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
                                                • value @ url
                                                • 164. SymptomLogicalModel.metadata.modifierExtension
                                                  Definition

                                                  May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

                                                  Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

                                                  ShortExtensions that cannot be ignored even if unrecognized
                                                  Comments

                                                  There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                                                  Control0..*
                                                  TypeExtension
                                                  Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
                                                  Summarytrue
                                                  Requirements

                                                  Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

                                                  Alternate Namesextensions, user content, modifiers
                                                  Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                                                  ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
                                                  166. SymptomLogicalModel.metadata.documentationDate
                                                  Definition

                                                  The date the symptom was entered, edited, or deleted.

                                                  ShortDate of recorded visit
                                                  Control1..1
                                                  TypedateTime
                                                  Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                                                  168. SymptomLogicalModel.metadata.issued
                                                  Definition

                                                  Date/time when the current version was made available.

                                                  ShortDate/time when the current version was made available.
                                                  Control1..1
                                                  TypedateTime
                                                  Primitive ValueThis primitive element may be present, or absent, or replaced by an extension