HL7 FHIR Implementation Guide: Transversal Clinical Core
1.0.1 - STU1 Belgium flag

HL7 FHIR Implementation Guide: Transversal Clinical Core, published by eHealth Platform. This guide is not an authorized publication; it is the continuous build for version 1.0.1 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/hl7-be/core-clinical/ and changes regularly. See the Directory of published versions

Logical Model: BeModelObservation - Detailed Descriptions

Active as of 2025-10-16

Definitions for the be-model-observation logical model.

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

0. be-model-observation
Definition

Observation logical model

ShortBeObservation Model
Control0..*
Is Modifierfalse
Logical ModelInstances of this logical model are not marked to be the target of a Reference
2. be-model-observation.identifier
Definition

Unique identifier for the observation

ShortUnique identifier for the observation
NoteThis is a business identifier, not a resource identifier (see discussion)
Control1..*
TypeIdentifier
4. be-model-observation.recordedDate
Definition

Date when the observation was recorded

ShortDate when the observation was recorded
Control1..1
TypedateTime
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
6. be-model-observation.observationDate[x]
Definition

Date or period of the observation

ShortDate or period of the observation
Control1..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
8. be-model-observation.recorder
Definition

Person, organisation or device that recorded the observation

ShortPerson, organisation or device that recorded the observation
Control1..1
TypeReference
10. be-model-observation.performer
Definition

The professional that performed the observation

ShortThe professional that performed the observation
Control0..1
TypeReference
12. be-model-observation.patient
Definition

The patient that this observation is about

ShortThe patient that this observation is about
Control1..1
TypeReference
14. be-model-observation.request
Definition

The request that this observation is fulfilling

ShortThe request that this observation is fulfilling
Control0..1
TypeReference
16. be-model-observation.partOfProcedure
Definition

Part of referenced procedure

ShortPart of referenced procedure
Control0..*
TypeReference
18. be-model-observation.specimen
Definition

The specimen that was used when this observation was made

ShortThe specimen that was used when this observation was made
Control0..1
TypeReference
20. be-model-observation.device
Definition

The device used to generate the observation data

ShortThe device used to generate the observation data
Control0..1
TypeReference
22. be-model-observation.category
Definition

A code that classifies the general type of observation being made

ShortA code that classifies the general type of observation being made
Control0..*
TypeCodeableConcept
24. be-model-observation.code
Definition

Describes what was observed. Sometimes this is called the observation 'name'

ShortDescribes what was observed. Sometimes this is called the observation 'name'
Control1..1
TypeCodeableConcept
26. be-model-observation.value[x]
Definition

The value of the observation - typically a code, an amount or a date

ShortThe value of the observation - typically a code, an amount or a date
Control0..1
TypeChoice of: Quantity, CodeableConcept, string, boolean, integer, Range, Ratio, time, 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
28. be-model-observation.component
Definition

Some observations have multiple component observations

ShortSome observations have multiple component observations
Control0..*
TypeBackboneElement
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
30. be-model-observation.component.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
Typestring
Is Modifierfalse
XML FormatIn the XML format, this property is represented as an attribute.
Summaryfalse
32. be-model-observation.component.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 manageable, 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 be-model-observation.component.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
  • value @ url
  • 34. be-model-observation.component.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 manageable, 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())
    36. be-model-observation.component.code
    Definition

    Describes what was observed.

    ShortDescribes what was observed.
    Control1..1
    TypeCodeableConcept
    38. be-model-observation.component.value[x]
    Definition

    The value of the component observation - typically a code, an amount or a date

    ShortThe value of the component observation - typically a code, an amount or a date
    Control0..1
    TypeChoice of: Quantity, CodeableConcept, string, boolean, integer, Range, Ratio, time, 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
    40. be-model-observation.status
    Definition

    The status of the result value.

    ShortThe status of the result value.
    Control1..1
    Typecode
    Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
    42. be-model-observation.interpretation
    Definition

    A categorical assessment of an observation value

    ShortA categorical assessment of an observation value
    Control0..*
    TypeCodeableConcept
    44. be-model-observation.referenceRange
    Definition

    Guidance on how to interpret the value by comparison to a normal or recommended range

    ShortGuidance on how to interpret the value by comparison to a normal or recommended range
    Control0..*
    TypeBackboneElement
    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    46. be-model-observation.referenceRange.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
    Typestring
    Is Modifierfalse
    XML FormatIn the XML format, this property is represented as an attribute.
    Summaryfalse
    48. be-model-observation.referenceRange.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 manageable, 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 be-model-observation.referenceRange.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
    • value @ url
    • 50. be-model-observation.referenceRange.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 manageable, 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. be-model-observation.referenceRange.low
      Definition

      Low Range, if relevant

      ShortLow Range, if relevant
      Control0..1
      TypeQuantity
      54. be-model-observation.referenceRange.high
      Definition

      High Range, if relevant

      ShortHigh Range, if relevant
      Control0..1
      TypeQuantity
      56. be-model-observation.bodySite
      Definition

      The site on the subject's body where the observation was made (i.e. the target site)

      ShortThe site on the subject's body where the observation was made (i.e. the target site)
      Control0..1
      Typehttps://www.ehealth.fgov.be/standards/fhir/core-clinical/StructureDefinition/be-model-bodysite
      58. be-model-observation.certainty
      Definition

      A subjective assessment of the quality of the observation

      ShortA subjective assessment of the quality of the observation
      Control0..1
      TypeCodeableConcept
      60. be-model-observation.note
      Definition

      Comments about the observation or the results

      ShortComments about the observation or the results
      Control0..*
      TypeAnnotation

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

      0. be-model-observation
      Definition

      Observation logical model

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

      Unique identifier for the observation

      ShortUnique identifier for the observation
      NoteThis is a business identifier, not a resource identifier (see discussion)
      Control1..*
      TypeIdentifier
      4. be-model-observation.recordedDate
      Definition

      Date when the observation was recorded

      ShortDate when the observation was recorded
      Control1..1
      TypedateTime
      Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
      6. be-model-observation.observationDate[x]
      Definition

      Date or period of the observation

      ShortDate or period of the observation
      Control1..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
      8. be-model-observation.recorder
      Definition

      Person, organisation or device that recorded the observation

      ShortPerson, organisation or device that recorded the observation
      Control1..1
      TypeReference
      10. be-model-observation.performer
      Definition

      The professional that performed the observation

      ShortThe professional that performed the observation
      Control0..1
      TypeReference
      12. be-model-observation.patient
      Definition

      The patient that this observation is about

      ShortThe patient that this observation is about
      Control1..1
      TypeReference
      14. be-model-observation.request
      Definition

      The request that this observation is fulfilling

      ShortThe request that this observation is fulfilling
      Control0..1
      TypeReference
      16. be-model-observation.partOfProcedure
      Definition

      Part of referenced procedure

      ShortPart of referenced procedure
      Control0..*
      TypeReference
      18. be-model-observation.specimen
      Definition

      The specimen that was used when this observation was made

      ShortThe specimen that was used when this observation was made
      Control0..1
      TypeReference
      20. be-model-observation.device
      Definition

      The device used to generate the observation data

      ShortThe device used to generate the observation data
      Control0..1
      TypeReference
      22. be-model-observation.category
      Definition

      A code that classifies the general type of observation being made

      ShortA code that classifies the general type of observation being made
      Control0..*
      TypeCodeableConcept
      24. be-model-observation.code
      Definition

      Describes what was observed. Sometimes this is called the observation 'name'

      ShortDescribes what was observed. Sometimes this is called the observation 'name'
      Control1..1
      TypeCodeableConcept
      26. be-model-observation.value[x]
      Definition

      The value of the observation - typically a code, an amount or a date

      ShortThe value of the observation - typically a code, an amount or a date
      Control0..1
      TypeChoice of: Quantity, CodeableConcept, string, boolean, integer, Range, Ratio, time, 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
      28. be-model-observation.component
      Definition

      Some observations have multiple component observations

      ShortSome observations have multiple component observations
      Control0..*
      TypeBackboneElement
      30. be-model-observation.component.code
      Definition

      Describes what was observed.

      ShortDescribes what was observed.
      Control1..1
      TypeCodeableConcept
      32. be-model-observation.component.value[x]
      Definition

      The value of the component observation - typically a code, an amount or a date

      ShortThe value of the component observation - typically a code, an amount or a date
      Control0..1
      TypeChoice of: Quantity, CodeableConcept, string, boolean, integer, Range, Ratio, time, 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
      34. be-model-observation.status
      Definition

      The status of the result value.

      ShortThe status of the result value.
      Control1..1
      Typecode
      Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
      36. be-model-observation.interpretation
      Definition

      A categorical assessment of an observation value

      ShortA categorical assessment of an observation value
      Control0..*
      TypeCodeableConcept
      38. be-model-observation.referenceRange
      Definition

      Guidance on how to interpret the value by comparison to a normal or recommended range

      ShortGuidance on how to interpret the value by comparison to a normal or recommended range
      Control0..*
      TypeBackboneElement
      40. be-model-observation.referenceRange.low
      Definition

      Low Range, if relevant

      ShortLow Range, if relevant
      Control0..1
      TypeQuantity
      42. be-model-observation.referenceRange.high
      Definition

      High Range, if relevant

      ShortHigh Range, if relevant
      Control0..1
      TypeQuantity
      44. be-model-observation.bodySite
      Definition

      The site on the subject's body where the observation was made (i.e. the target site)

      ShortThe site on the subject's body where the observation was made (i.e. the target site)
      Control0..1
      Typehttps://www.ehealth.fgov.be/standards/fhir/core-clinical/StructureDefinition/be-model-bodysite
      46. be-model-observation.certainty
      Definition

      A subjective assessment of the quality of the observation

      ShortA subjective assessment of the quality of the observation
      Control0..1
      TypeCodeableConcept
      48. be-model-observation.note
      Definition

      Comments about the observation or the results

      ShortComments about the observation or the results
      Control0..*
      TypeAnnotation

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

      0. be-model-observation
      Definition

      Observation logical model

      ShortBeObservation Model
      Control0..*
      Is Modifierfalse
      Logical ModelInstances of this logical model are not marked to be the target of a Reference
      2. be-model-observation.identifier
      Definition

      Unique identifier for the observation

      ShortUnique identifier for the observation
      NoteThis is a business identifier, not a resource identifier (see discussion)
      Control1..*
      TypeIdentifier
      4. be-model-observation.recordedDate
      Definition

      Date when the observation was recorded

      ShortDate when the observation was recorded
      Control1..1
      TypedateTime
      Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
      6. be-model-observation.observationDate[x]
      Definition

      Date or period of the observation

      ShortDate or period of the observation
      Control1..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
      8. be-model-observation.recorder
      Definition

      Person, organisation or device that recorded the observation

      ShortPerson, organisation or device that recorded the observation
      Control1..1
      TypeReference
      10. be-model-observation.performer
      Definition

      The professional that performed the observation

      ShortThe professional that performed the observation
      Control0..1
      TypeReference
      12. be-model-observation.patient
      Definition

      The patient that this observation is about

      ShortThe patient that this observation is about
      Control1..1
      TypeReference
      14. be-model-observation.request
      Definition

      The request that this observation is fulfilling

      ShortThe request that this observation is fulfilling
      Control0..1
      TypeReference
      16. be-model-observation.partOfProcedure
      Definition

      Part of referenced procedure

      ShortPart of referenced procedure
      Control0..*
      TypeReference
      18. be-model-observation.specimen
      Definition

      The specimen that was used when this observation was made

      ShortThe specimen that was used when this observation was made
      Control0..1
      TypeReference
      20. be-model-observation.device
      Definition

      The device used to generate the observation data

      ShortThe device used to generate the observation data
      Control0..1
      TypeReference
      22. be-model-observation.category
      Definition

      A code that classifies the general type of observation being made

      ShortA code that classifies the general type of observation being made
      Control0..*
      TypeCodeableConcept
      24. be-model-observation.code
      Definition

      Describes what was observed. Sometimes this is called the observation 'name'

      ShortDescribes what was observed. Sometimes this is called the observation 'name'
      Control1..1
      TypeCodeableConcept
      26. be-model-observation.value[x]
      Definition

      The value of the observation - typically a code, an amount or a date

      ShortThe value of the observation - typically a code, an amount or a date
      Control0..1
      TypeChoice of: Quantity, CodeableConcept, string, boolean, integer, Range, Ratio, time, 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
      28. be-model-observation.component
      Definition

      Some observations have multiple component observations

      ShortSome observations have multiple component observations
      Control0..*
      TypeBackboneElement
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      30. be-model-observation.component.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
      Typestring
      Is Modifierfalse
      XML FormatIn the XML format, this property is represented as an attribute.
      Summaryfalse
      32. be-model-observation.component.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 manageable, 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 be-model-observation.component.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
      • value @ url
      • 34. be-model-observation.component.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 manageable, 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())
        36. be-model-observation.component.code
        Definition

        Describes what was observed.

        ShortDescribes what was observed.
        Control1..1
        TypeCodeableConcept
        38. be-model-observation.component.value[x]
        Definition

        The value of the component observation - typically a code, an amount or a date

        ShortThe value of the component observation - typically a code, an amount or a date
        Control0..1
        TypeChoice of: Quantity, CodeableConcept, string, boolean, integer, Range, Ratio, time, 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
        40. be-model-observation.status
        Definition

        The status of the result value.

        ShortThe status of the result value.
        Control1..1
        Typecode
        Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
        42. be-model-observation.interpretation
        Definition

        A categorical assessment of an observation value

        ShortA categorical assessment of an observation value
        Control0..*
        TypeCodeableConcept
        44. be-model-observation.referenceRange
        Definition

        Guidance on how to interpret the value by comparison to a normal or recommended range

        ShortGuidance on how to interpret the value by comparison to a normal or recommended range
        Control0..*
        TypeBackboneElement
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        46. be-model-observation.referenceRange.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
        Typestring
        Is Modifierfalse
        XML FormatIn the XML format, this property is represented as an attribute.
        Summaryfalse
        48. be-model-observation.referenceRange.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 manageable, 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 be-model-observation.referenceRange.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
        • value @ url
        • 50. be-model-observation.referenceRange.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 manageable, 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. be-model-observation.referenceRange.low
          Definition

          Low Range, if relevant

          ShortLow Range, if relevant
          Control0..1
          TypeQuantity
          54. be-model-observation.referenceRange.high
          Definition

          High Range, if relevant

          ShortHigh Range, if relevant
          Control0..1
          TypeQuantity
          56. be-model-observation.bodySite
          Definition

          The site on the subject's body where the observation was made (i.e. the target site)

          ShortThe site on the subject's body where the observation was made (i.e. the target site)
          Control0..1
          Typehttps://www.ehealth.fgov.be/standards/fhir/core-clinical/StructureDefinition/be-model-bodysite
          58. be-model-observation.certainty
          Definition

          A subjective assessment of the quality of the observation

          ShortA subjective assessment of the quality of the observation
          Control0..1
          TypeCodeableConcept
          60. be-model-observation.note
          Definition

          Comments about the observation or the results

          ShortComments about the observation or the results
          Control0..*
          TypeAnnotation