FHIR Extensions Pack
5.3.0-ballot-tc1 - (September 2025 Ballot)
FHIR Extensions Pack
5.3.0-ballot-tc1 - (September 2025 Ballot)
FHIR Extensions Pack, published by HL7 International / FHIR Infrastructure. This guide is not an authorized publication; it is the continuous build for version 5.3.0-ballot-tc1 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/fhir-extensions/ and changes regularly. See the Directory of published versions
| Page standards status: Draft | Maturity Level: 2 |
Definitions for the target-feature-assertion extension.
Guidance on how to interpret the contents of this table can be foundhere
| 0. Extension | |
| Definition | A declaration that the data in a resource was authored by an application that conformed to the set of element level obligations described in the referenced profile Optional Extension Element - found in all resources. |
| Short | Authored by an application conforming to a set of obligationsOptional Extensions Element |
| Comments | This extension is a statement about the provenance of a particular version of the resource that it is describing; as such, it should be made in a Provenance resource referring to that particular version. Alternatively, the extension can be placed in the resource about which the declaration is made (in Resource.meta); in this case, the declaration SHOULD be removed when the resource data is altered (it may be replaced by a new declaration). |
| Control | 0..* |
| Is Modifier | false |
| Invariants | ele-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()) |
| 2. Extension.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. |
| Short | Additional 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. |
| Control | 20..* |
| Type | Extension |
| Is Modifier | false |
| Summary | false |
| Alternate Names | extensions, user content |
| Invariants | ele-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()) |
| Slicing | This element introduces a set of slices on Extension.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators: |
| 4. Extension.extension:definition | |
| Slice Name | definition |
| Definition | A reference to the definition of the feature by its canonical URL |
| Short | Identifies the feature definitionAdditional content defined by implementations |
| Comments | The type is |
| Control | 10..1* |
| Type | Extension |
| Is Modifier | false |
| Summary | false |
| Invariants | ele-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()) |
| 6. Extension.extension:definition.extension | |
| Definition | An Extension 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. |
| Short | ExtensionAdditional 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. |
| Control | 0..0* |
| Type | Extension |
| Is Modifier | false |
| Summary | false |
| Alternate Names | extensions, user content |
| Invariants | ele-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()) |
| Slicing | This element introduces a set of slices on Extension.extension.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators: |
| 8. Extension.extension:definition.url | |
| Definition | Source of the definition for the extension code - a logical name or a URL. |
| Short | identifies the meaning of the extension |
| Comments | The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension. |
| Control | 1..1 |
| Type | uri |
| Is Modifier | false |
| Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
| XML Format | In the XML format, this property is represented as an attribute. |
| Summary | false |
| Fixed Value | definition |
| 10. Extension.extension:definition.value[x] | |
| Definition | Value of extension - must be one of a constrained set of the data types (see Extensibility for a list). |
| Short | Value of extension |
| Control | 10..1 This element is affected by the following invariants: ext-1 |
| Type | uri, date, Meta, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Availability, integer64, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, ExtendedContactDetail, CodeableConcept, ParameterDefinition, dateTime, code, string, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time |
| [x] Note | SeeChoice of Data Typesfor further information about how to use [x] |
| Is Modifier | false |
| Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
| Summary | false |
| Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) |
| 12. Extension.extension:value | |
| Slice Name | value |
| Definition | The value of the feature (as defined in the definition of the feature) |
| Short | The value of the featureAdditional content defined by implementations |
| Control | 10..1* |
| Type | Extension |
| Is Modifier | false |
| Summary | false |
| Invariants | ele-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()) |
| 14. Extension.extension:value.extension | |
| Definition | An Extension 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. |
| Short | ExtensionAdditional 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. |
| Control | 0..0* |
| Type | Extension |
| Is Modifier | false |
| Summary | false |
| Alternate Names | extensions, user content |
| Invariants | ele-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()) |
| Slicing | This element introduces a set of slices on Extension.extension.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators: |
| 16. Extension.extension:value.url | |
| Definition | Source of the definition for the extension code - a logical name or a URL. |
| Short | identifies the meaning of the extension |
| Comments | The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension. |
| Control | 1..1 |
| Type | uri |
| Is Modifier | false |
| Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
| XML Format | In the XML format, this property is represented as an attribute. |
| Summary | false |
| Fixed Value | value |
| 18. Extension.extension:value.value[x] | |
| Definition | Value of extension - must be one of a constrained set of the data types (see Extensibility for a list). |
| Short | Value of extension |
| Control | 10..1 This element is affected by the following invariants: ext-1 |
| Type | Choice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, integer64, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, CodeableReference, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, RatioRange, Reference, SampledData, Signature, Timing, ContactDetail, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Availability, ExtendedContactDetail, Dosage, Meta |
| [x] Note | SeeChoice of Data Typesfor further information about how to use [x] |
| Is Modifier | false |
| Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
| Summary | false |
| Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) |
| 20. Extension.extension:property | |
| Slice Name | property |
| Definition | Provides a value for a qualifier of the feature |
| Short | Provides a value for a qualifier of the featureAdditional content defined by implementations |
| Control | 0..* |
| Type | Extension |
| Is Modifier | false |
| Summary | false |
| Invariants | ele-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()) |
| 22. Extension.extension:property.extension | |
| Definition | An Extension 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. |
| Short | ExtensionAdditional 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. |
| Control | 20..2* |
| Type | Extension |
| Is Modifier | false |
| Summary | false |
| Alternate Names | extensions, user content |
| Invariants | ele-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()) |
| Slicing | This element introduces a set of slices on Extension.extension.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators: |
| 24. Extension.extension:property.extension:name | |
| Slice Name | name |
| Definition | A reference to the qualifier of the feature by its name |
| Short | Identifies the feature qualifierAdditional content defined by implementations |
| Comments | The type is |
| Control | 10..1* |
| Type | Extension |
| Is Modifier | false |
| Summary | false |
| Invariants | ele-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()) |
| 26. Extension.extension:property.extension:name.extension | |
| Definition | An Extension 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. |
| Short | ExtensionAdditional 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. |
| Control | 0..0* |
| Type | Extension |
| Is Modifier | false |
| Summary | false |
| Alternate Names | extensions, user content |
| Invariants | ele-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()) |
| Slicing | This element introduces a set of slices on Extension.extension.extension.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators: |
| 28. Extension.extension:property.extension:name.url | |
| Definition | Source of the definition for the extension code - a logical name or a URL. |
| Short | identifies the meaning of the extension |
| Comments | The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension. |
| Control | 1..1 |
| Type | uri |
| Is Modifier | false |
| Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
| XML Format | In the XML format, this property is represented as an attribute. |
| Summary | false |
| Fixed Value | name |
| 30. Extension.extension:property.extension:name.value[x] | |
| Definition | Value of extension - must be one of a constrained set of the data types (see Extensibility for a list). |
| Short | Value of extension |
| Control | 10..1 This element is affected by the following invariants: ext-1 |
| Type | code, date, Meta, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Availability, integer64, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, ExtendedContactDetail, CodeableConcept, ParameterDefinition, dateTime, string, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time |
| [x] Note | SeeChoice of Data Typesfor further information about how to use [x] |
| Is Modifier | false |
| Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
| Summary | false |
| Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) |
| 32. Extension.extension:property.extension:value | |
| Slice Name | value |
| Definition | The value of the feature qualifier (as defined in the definition of the feature) |
| Short | The value of the feature qualifierAdditional content defined by implementations |
| Control | 10..1* |
| Type | Extension |
| Is Modifier | false |
| Summary | false |
| Invariants | ele-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()) |
| 34. Extension.extension:property.extension:value.extension | |
| Definition | An Extension 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. |
| Short | ExtensionAdditional 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. |
| Control | 0..0* |
| Type | Extension |
| Is Modifier | false |
| Summary | false |
| Alternate Names | extensions, user content |
| Invariants | ele-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()) |
| Slicing | This element introduces a set of slices on Extension.extension.extension.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators: |
| 36. Extension.extension:property.extension:value.url | |
| Definition | Source of the definition for the extension code - a logical name or a URL. |
| Short | identifies the meaning of the extension |
| Comments | The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension. |
| Control | 1..1 |
| Type | uri |
| Is Modifier | false |
| Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
| XML Format | In the XML format, this property is represented as an attribute. |
| Summary | false |
| Fixed Value | value |
| 38. Extension.extension:property.extension:value.value[x] | |
| Definition | Value of extension - must be one of a constrained set of the data types (see Extensibility for a list). |
| Short | Value of extension |
| Control | 10..1 This element is affected by the following invariants: ext-1 |
| Type | Choice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, integer64, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, CodeableReference, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, RatioRange, Reference, SampledData, Signature, Timing, ContactDetail, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Availability, ExtendedContactDetail, Dosage, Meta |
| [x] Note | SeeChoice of Data Typesfor further information about how to use [x] |
| Is Modifier | false |
| Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
| Summary | false |
| Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) |
| 40. Extension.extension:property.url | |
| Definition | Source of the definition for the extension code - a logical name or a URL. |
| Short | identifies the meaning of the extension |
| Comments | The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension. |
| Control | 1..1 |
| Type | uri |
| Is Modifier | false |
| Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
| XML Format | In the XML format, this property is represented as an attribute. |
| Summary | false |
| Fixed Value | property |
| 42. Extension.extension:property.value[x] | |
| Definition | Value of extension - must be one of a constrained set of the data types (see Extensibility for a list). |
| Short | Value of extension |
| Control | 0..01 This element is affected by the following invariants: ext-1 |
| Type | Choice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, integer64, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, CodeableReference, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, RatioRange, Reference, SampledData, Signature, Timing, ContactDetail, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Availability, ExtendedContactDetail, Dosage, Meta |
| Is Modifier | false |
| Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
| Summary | false |
| Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) |
| 44. Extension.url | |
| Definition | Source of the definition for the extension code - a logical name or a URL. |
| Short | identifies the meaning of the extension |
| Comments | The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension. |
| Control | 1..1 |
| Type | uri |
| Is Modifier | false |
| XML Format | In the XML format, this property is represented as an attribute. |
| Summary | false |
| Fixed Value | http://hl7.org/fhir/StructureDefinition/feature-assertion |
| 46. Extension.value[x] | |
| Definition | Value of extension - must be one of a constrained set of the data types (see Extensibility for a list). |
| Short | Value of extension |
| Control | 0..01 This element is affected by the following invariants: ext-1 |
| Type | Choice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, integer64, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, CodeableReference, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, RatioRange, Reference, SampledData, Signature, Timing, ContactDetail, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Availability, ExtendedContactDetail, Dosage, Meta |
| Is Modifier | false |
| Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
| Summary | false |
| Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) |
Guidance on how to interpret the contents of this table can be foundhere
| 0. Extension | |
| Definition | A declaration that the data in a resource was authored by an application that conformed to the set of element level obligations described in the referenced profile |
| Short | Authored by an application conforming to a set of obligations |
| Comments | This extension is a statement about the provenance of a particular version of the resource that it is describing; as such, it should be made in a Provenance resource referring to that particular version. Alternatively, the extension can be placed in the resource about which the declaration is made (in Resource.meta); in this case, the declaration SHOULD be removed when the resource data is altered (it may be replaced by a new declaration). |
| Control | 0..* |
| Is Modifier | false |
| 2. Extension.extension:definition | |
| Slice Name | definition |
| Definition | A reference to the definition of the feature by its canonical URL |
| Short | Identifies the feature definition |
| Comments | The type is |
| Control | 1..1 |
| Type | Extension |
| 4. Extension.extension:definition.extension | |
| Control | 0..0 |
| 6. Extension.extension:definition.url | |
| Type | uri |
| Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
| Fixed Value | definition |
| 8. Extension.extension:definition.value[x] | |
| Control | 1..? |
| Type | uri |
| [x] Note | SeeChoice of Data Typesfor further information about how to use [x] |
| Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
| 10. Extension.extension:value | |
| Slice Name | value |
| Definition | The value of the feature (as defined in the definition of the feature) |
| Short | The value of the feature |
| Control | 1..1 |
| Type | Extension |
| 12. Extension.extension:value.extension | |
| Control | 0..0 |
| 14. Extension.extension:value.url | |
| Type | uri |
| Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
| Fixed Value | value |
| 16. Extension.extension:value.value[x] | |
| Control | 1..? |
| [x] Note | SeeChoice of Data Typesfor further information about how to use [x] |
| 18. Extension.extension:property | |
| Slice Name | property |
| Definition | Provides a value for a qualifier of the feature |
| Short | Provides a value for a qualifier of the feature |
| Control | 0..* |
| Type | Extension |
| 20. Extension.extension:property.extension | |
| Control | 2..2 |
| 22. Extension.extension:property.extension:name | |
| Slice Name | name |
| Definition | A reference to the qualifier of the feature by its name |
| Short | Identifies the feature qualifier |
| Comments | The type is |
| Control | 1..1 |
| Type | Extension |
| 24. Extension.extension:property.extension:name.extension | |
| Control | 0..0 |
| 26. Extension.extension:property.extension:name.url | |
| Type | uri |
| Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
| Fixed Value | name |
| 28. Extension.extension:property.extension:name.value[x] | |
| Control | 1..? |
| Type | code |
| [x] Note | SeeChoice of Data Typesfor further information about how to use [x] |
| Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
| 30. Extension.extension:property.extension:value | |
| Slice Name | value |
| Definition | The value of the feature qualifier (as defined in the definition of the feature) |
| Short | The value of the feature qualifier |
| Control | 1..1 |
| Type | Extension |
| 32. Extension.extension:property.extension:value.extension | |
| Control | 0..0 |
| 34. Extension.extension:property.extension:value.url | |
| Type | uri |
| Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
| Fixed Value | value |
| 36. Extension.extension:property.extension:value.value[x] | |
| Control | 1..? |
| [x] Note | SeeChoice of Data Typesfor further information about how to use [x] |
| 38. Extension.extension:property.url | |
| Type | uri |
| Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
| Fixed Value | property |
| 40. Extension.extension:property.value[x] | |
| Control | 0..0 |
| 42. Extension.url | |
| Fixed Value | http://hl7.org/fhir/StructureDefinition/feature-assertion |
| 44. Extension.value[x] | |
| Control | 0..0 |
Guidance on how to interpret the contents of this table can be foundhere
| 0. Extension | |
| Definition | A declaration that the data in a resource was authored by an application that conformed to the set of element level obligations described in the referenced profile |
| Short | Authored by an application conforming to a set of obligations |
| Comments | This extension is a statement about the provenance of a particular version of the resource that it is describing; as such, it should be made in a Provenance resource referring to that particular version. Alternatively, the extension can be placed in the resource about which the declaration is made (in Resource.meta); in this case, the declaration SHOULD be removed when the resource data is altered (it may be replaced by a new declaration). |
| Control | 0..* |
| Is Modifier | false |
| Invariants | ele-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()) |
| 2. Extension.id | |
| Definition | Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces. |
| Short | Unique id for inter-element referencing |
| Control | 0..1 This element is affected by the following invariants: ele-1 |
| Type | id |
| Is Modifier | false |
| XML Format | In the XML format, this property is represented as an attribute. |
| Summary | false |
| 4. Extension.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. |
| Short | Additional 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. |
| Control | 2..* |
| Type | Extension |
| Is Modifier | false |
| Summary | false |
| Alternate Names | extensions, user content |
| Invariants | ele-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()) |
| Slicing | This element introduces a set of slices on Extension.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators: |
| 6. Extension.extension:definition | |
| Slice Name | definition |
| Definition | A reference to the definition of the feature by its canonical URL |
| Short | Identifies the feature definition |
| Comments | The type is |
| Control | 1..1 |
| Type | Extension |
| Is Modifier | false |
| Summary | false |
| Invariants | ele-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()) |
| 8. Extension.extension:definition.id | |
| Definition | Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces. |
| Short | Unique id for inter-element referencing |
| Control | 0..1 This element is affected by the following invariants: ele-1 |
| Type | id |
| Is Modifier | false |
| XML Format | In the XML format, this property is represented as an attribute. |
| Summary | false |
| 10. Extension.extension:definition.extension | |
| Definition | An Extension |
| Short | Extension |
| Control | 0..0 |
| Type | Extension |
| Is Modifier | false |
| Summary | false |
| Invariants | ele-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()) |
| Slicing | This element introduces a set of slices on Extension.extension.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators: |
| 12. Extension.extension:definition.url | |
| Definition | Source of the definition for the extension code - a logical name or a URL. |
| Short | identifies the meaning of the extension |
| Comments | The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension. |
| Control | 1..1 |
| Type | uri |
| Is Modifier | false |
| Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
| XML Format | In the XML format, this property is represented as an attribute. |
| Summary | false |
| Fixed Value | definition |
| 14. Extension.extension:definition.value[x] | |
| Definition | Value of extension - must be one of a constrained set of the data types (see Extensibility for a list). |
| Short | Value of extension |
| Control | 1..1 This element is affected by the following invariants: ext-1 |
| Type | uri |
| [x] Note | SeeChoice of Data Typesfor further information about how to use [x] |
| Is Modifier | false |
| Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
| Summary | false |
| Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) |
| 16. Extension.extension:value | |
| Slice Name | value |
| Definition | The value of the feature (as defined in the definition of the feature) |
| Short | The value of the feature |
| Control | 1..1 |
| Type | Extension |
| Is Modifier | false |
| Summary | false |
| Invariants | ele-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()) |
| 18. Extension.extension:value.id | |
| Definition | Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces. |
| Short | Unique id for inter-element referencing |
| Control | 0..1 This element is affected by the following invariants: ele-1 |
| Type | id |
| Is Modifier | false |
| XML Format | In the XML format, this property is represented as an attribute. |
| Summary | false |
| 20. Extension.extension:value.extension | |
| Definition | An Extension |
| Short | Extension |
| Control | 0..0 |
| Type | Extension |
| Is Modifier | false |
| Summary | false |
| Invariants | ele-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()) |
| Slicing | This element introduces a set of slices on Extension.extension.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators: |
| 22. Extension.extension:value.url | |
| Definition | Source of the definition for the extension code - a logical name or a URL. |
| Short | identifies the meaning of the extension |
| Comments | The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension. |
| Control | 1..1 |
| Type | uri |
| Is Modifier | false |
| Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
| XML Format | In the XML format, this property is represented as an attribute. |
| Summary | false |
| Fixed Value | value |
| 24. Extension.extension:value.value[x] | |
| Definition | Value of extension - must be one of a constrained set of the data types (see Extensibility for a list). |
| Short | Value of extension |
| Control | 1..1 This element is affected by the following invariants: ext-1 |
| Type | Choice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, integer64, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, CodeableReference, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, RatioRange, Reference, SampledData, Signature, Timing, ContactDetail, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Availability, ExtendedContactDetail, Dosage, Meta |
| [x] Note | SeeChoice of Data Typesfor further information about how to use [x] |
| Is Modifier | false |
| Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
| Summary | false |
| Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) |
| 26. Extension.extension:property | |
| Slice Name | property |
| Definition | Provides a value for a qualifier of the feature |
| Short | Provides a value for a qualifier of the feature |
| Control | 0..* |
| Type | Extension |
| Is Modifier | false |
| Summary | false |
| Invariants | ele-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()) |
| 28. Extension.extension:property.id | |
| Definition | Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces. |
| Short | Unique id for inter-element referencing |
| Control | 0..1 This element is affected by the following invariants: ele-1 |
| Type | id |
| Is Modifier | false |
| XML Format | In the XML format, this property is represented as an attribute. |
| Summary | false |
| 30. Extension.extension:property.extension | |
| Definition | An Extension |
| Short | Extension |
| Control | 2..2 |
| Type | Extension |
| Is Modifier | false |
| Summary | false |
| Invariants | ele-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()) |
| Slicing | This element introduces a set of slices on Extension.extension.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators: |
| 32. Extension.extension:property.extension:name | |
| Slice Name | name |
| Definition | A reference to the qualifier of the feature by its name |
| Short | Identifies the feature qualifier |
| Comments | The type is |
| Control | 1..1 |
| Type | Extension |
| Is Modifier | false |
| Summary | false |
| Invariants | ele-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()) |
| 34. Extension.extension:property.extension:name.id | |
| Definition | Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces. |
| Short | Unique id for inter-element referencing |
| Control | 0..1 This element is affected by the following invariants: ele-1 |
| Type | id |
| Is Modifier | false |
| XML Format | In the XML format, this property is represented as an attribute. |
| Summary | false |
| 36. Extension.extension:property.extension:name.extension | |
| Definition | An Extension |
| Short | Extension |
| Control | 0..0 |
| Type | Extension |
| Is Modifier | false |
| Summary | false |
| Invariants | ele-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()) |
| Slicing | This element introduces a set of slices on Extension.extension.extension.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators: |
| 38. Extension.extension:property.extension:name.url | |
| Definition | Source of the definition for the extension code - a logical name or a URL. |
| Short | identifies the meaning of the extension |
| Comments | The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension. |
| Control | 1..1 |
| Type | uri |
| Is Modifier | false |
| Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
| XML Format | In the XML format, this property is represented as an attribute. |
| Summary | false |
| Fixed Value | name |
| 40. Extension.extension:property.extension:name.value[x] | |
| Definition | Value of extension - must be one of a constrained set of the data types (see Extensibility for a list). |
| Short | Value of extension |
| Control | 1..1 This element is affected by the following invariants: ext-1 |
| Type | code |
| [x] Note | SeeChoice of Data Typesfor further information about how to use [x] |
| Is Modifier | false |
| Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
| Summary | false |
| Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) |
| 42. Extension.extension:property.extension:value | |
| Slice Name | value |
| Definition | The value of the feature qualifier (as defined in the definition of the feature) |
| Short | The value of the feature qualifier |
| Control | 1..1 |
| Type | Extension |
| Is Modifier | false |
| Summary | false |
| Invariants | ele-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()) |
| 44. Extension.extension:property.extension:value.id | |
| Definition | Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces. |
| Short | Unique id for inter-element referencing |
| Control | 0..1 This element is affected by the following invariants: ele-1 |
| Type | id |
| Is Modifier | false |
| XML Format | In the XML format, this property is represented as an attribute. |
| Summary | false |
| 46. Extension.extension:property.extension:value.extension | |
| Definition | An Extension |
| Short | Extension |
| Control | 0..0 |
| Type | Extension |
| Is Modifier | false |
| Summary | false |
| Invariants | ele-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()) |
| Slicing | This element introduces a set of slices on Extension.extension.extension.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators: |
| 48. Extension.extension:property.extension:value.url | |
| Definition | Source of the definition for the extension code - a logical name or a URL. |
| Short | identifies the meaning of the extension |
| Comments | The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension. |
| Control | 1..1 |
| Type | uri |
| Is Modifier | false |
| Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
| XML Format | In the XML format, this property is represented as an attribute. |
| Summary | false |
| Fixed Value | value |
| 50. Extension.extension:property.extension:value.value[x] | |
| Definition | Value of extension - must be one of a constrained set of the data types (see Extensibility for a list). |
| Short | Value of extension |
| Control | 1..1 This element is affected by the following invariants: ext-1 |
| Type | Choice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, integer64, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, CodeableReference, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, RatioRange, Reference, SampledData, Signature, Timing, ContactDetail, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Availability, ExtendedContactDetail, Dosage, Meta |
| [x] Note | SeeChoice of Data Typesfor further information about how to use [x] |
| Is Modifier | false |
| Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
| Summary | false |
| Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) |
| 52. Extension.extension:property.url | |
| Definition | Source of the definition for the extension code - a logical name or a URL. |
| Short | identifies the meaning of the extension |
| Comments | The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension. |
| Control | 1..1 |
| Type | uri |
| Is Modifier | false |
| Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
| XML Format | In the XML format, this property is represented as an attribute. |
| Summary | false |
| Fixed Value | property |
| 54. Extension.extension:property.value[x] | |
| Definition | Value of extension - must be one of a constrained set of the data types (see Extensibility for a list). |
| Short | Value of extension |
| Control | 0..0 This element is affected by the following invariants: ext-1 |
| Type | Choice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, integer64, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, CodeableReference, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, RatioRange, Reference, SampledData, Signature, Timing, ContactDetail, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Availability, ExtendedContactDetail, Dosage, Meta |
| Is Modifier | false |
| Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
| Summary | false |
| Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) |
| 56. Extension.url | |
| Definition | Source of the definition for the extension code - a logical name or a URL. |
| Short | identifies the meaning of the extension |
| Comments | The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension. |
| Control | 1..1 |
| Type | uri |
| Is Modifier | false |
| XML Format | In the XML format, this property is represented as an attribute. |
| Summary | false |
| Fixed Value | http://hl7.org/fhir/StructureDefinition/feature-assertion |
| 58. Extension.value[x] | |
| Definition | Value of extension - must be one of a constrained set of the data types (see Extensibility for a list). |
| Short | Value of extension |
| Control | 0..0 This element is affected by the following invariants: ext-1 |
| Type | Choice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, integer64, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, CodeableReference, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, RatioRange, Reference, SampledData, Signature, Timing, ContactDetail, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Availability, ExtendedContactDetail, Dosage, Meta |
| Is Modifier | false |
| Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
| Summary | false |
| Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) |
IG © 2022+ HL7 International / FHIR Infrastructure. Package hl7.fhir.uv.extensions#5.3.0-ballot-tc1 based on FHIR 5.0.0. Generated 2026-05-03
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