Extensions for Using Data Elements from FHIR R5 in FHIR R4
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Extensions for Using Data Elements from FHIR R5 in FHIR R4 - Downloaded Version null See the Directory of published versions

Extension: ExtensionAvailability_NotAvailableTime - Detailed Descriptions

Page standards status: Trial-use Maturity Level: 0

Definitions for the ext-R5-Availability.notAvailableTime extension.

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

0. Extension
Definition

R5: Availability.notAvailableTime (new:Element)


Optional Extension Element - found in all resources.

ShortR5: Not available during this time due to provided reason (new)Optional Extensions Element
Comments

Element Availability.notAvailableTime is not mapped to FHIR R4, since FHIR R5 Availability is not mapped. Element Availability.notAvailableTime has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element).

Control0..*
This element is affected by the following invariants: ele-1
Is Modifierfalse
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())
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

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 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.

ShortExtensionAdditional 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())
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())
SlicingThis element introduces a set of slices on Extension.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
  • value @ url
  • 4. Extension.extension:description
    Slice Namedescription
    Definition

    R5: Availability.notAvailableTime.description (new:string)

    ShortR5: Reason presented to the user explaining why time not available (new)Additional content defined by implementations
    Comments

    Element Availability.notAvailableTime.description is part of an existing definition because parent element Availability.notAvailableTime requires a cross-version extension. Element Availability.notAvailableTime.description is not mapped to FHIR R4, since FHIR R5 Availability is not mapped. Element Availability.notAvailableTime.description has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element). The reason will generally be provided to give the textual reason for displaying when the {item} is not available, e.g. 'Closed public holidays' or 'Independence Day'. In cases such as this, the during might not be included and local knowledge would be required in such cases (as don't desire to keep updating when the holiday occurs each year).

    e.g.2: 'Closed for maintenance over the summer' for this example you would want to include the during period, unless this was a university hospital and the "summer" period was well known, but would recommend its inclusion anyway.

    Control0..1*
    TypeExtension
    Is Modifierfalse
    Summaryfalse
    Requirements

    The reason that can be presented to the user as to why this time is not available. Element Availability.notAvailableTime.description is part of an existing definition because parent element Availability.notAvailableTime requires a cross-version extension. Element Availability.notAvailableTime.description is not mapped to FHIR R4, since FHIR R5 Availability is not mapped. Element Availability.notAvailableTime.description has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element).

    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())
    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:description.url
    Definition

    Source of the definition for the extension code - a logical name or a URL.

    Shortidentifies 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.

    Control1..1
    Typeuri
    Is Modifierfalse
    XML FormatIn the XML format, this property is represented as an attribute.
    Summaryfalse
    Fixed Valuedescription
    8. Extension.extension:description.value[x]
    Definition

    Reason presented to the user explaining why time not available.


    Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).

    ShortReason presented to the user explaining why time not availableValue of extension
    Comments

    The reason will generally be provided to give the textual reason for displaying when the {item} is not available, e.g. 'Closed public holidays' or 'Independence Day'. In cases such as this, the during might not be included and local knowledge would be required in such cases (as don't desire to keep updating when the holiday occurs each year).

    e.g.2: 'Closed for maintenance over the summer' for this example you would want to include the during period, unless this was a university hospital and the "summer" period was well known, but would recommend its inclusion anyway.

    Control0..1
    Typestring, date, Meta, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, Signature, unsignedInt, time
    [x] NoteSeeChoice of Data Typesfor further information about how to use [x]
    Is Modifierfalse
    Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
    Summaryfalse
    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    10. Extension.extension:during
    Slice Nameduring
    Definition

    R5: Availability.notAvailableTime.during (new:Period)

    ShortR5: Service not available during this period (new)Additional content defined by implementations
    Comments

    Element Availability.notAvailableTime.during is part of an existing definition because parent element Availability.notAvailableTime requires a cross-version extension. Element Availability.notAvailableTime.during is not mapped to FHIR R4, since FHIR R5 Availability is not mapped. Element Availability.notAvailableTime.during has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element).

    Control0..1*
    TypeExtension
    Is Modifierfalse
    Summaryfalse
    Requirements

    The {item} is not available (seasonally or for a public holiday) during this period. Element Availability.notAvailableTime.during is part of an existing definition because parent element Availability.notAvailableTime requires a cross-version extension. Element Availability.notAvailableTime.during is not mapped to FHIR R4, since FHIR R5 Availability is not mapped. Element Availability.notAvailableTime.during has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element).

    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())
    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())
    12. Extension.extension:during.url
    Definition

    Source of the definition for the extension code - a logical name or a URL.

    Shortidentifies 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.

    Control1..1
    Typeuri
    Is Modifierfalse
    XML FormatIn the XML format, this property is represented as an attribute.
    Summaryfalse
    Fixed Valueduring
    14. Extension.extension:during.value[x]
    Definition

    Service not available during this period.


    Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).

    ShortService not available during this periodValue of extension
    Control0..1
    TypePeriod, date, Meta, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, Coding, SampledData, id, positiveInt, Distance, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, Signature, unsignedInt, time
    [x] NoteSeeChoice of Data Typesfor further information about how to use [x]
    Is Modifierfalse
    Summaryfalse
    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    16. Extension.url
    Definition

    Source of the definition for the extension code - a logical name or a URL.

    Shortidentifies 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.

    Control1..1
    Typeuri
    Is Modifierfalse
    XML FormatIn the XML format, this property is represented as an attribute.
    Summaryfalse
    Fixed Valuehttp://hl7.org/fhir/5.0/StructureDefinition/extension-Availability.notAvailableTime
    18. Extension.value[x]
    Definition

    Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).

    ShortValue of extension
    Control0..01
    TypeChoice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, Reference, SampledData, Signature, Timing, ContactDetail, Contributor, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Dosage, Meta
    Is Modifierfalse
    Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
    Summaryfalse
    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    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

    R5: Availability.notAvailableTime (new:Element)

    ShortR5: Not available during this time due to provided reason (new)
    Comments

    Element Availability.notAvailableTime is not mapped to FHIR R4, since FHIR R5 Availability is not mapped. Element Availability.notAvailableTime has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element).

    Control0..*
    Is Modifierfalse
    2. Extension.extension
    Control0..*
    SlicingThis element introduces a set of slices on Extension.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
    • value @ url
    • 4. Extension.extension:description
      Slice Namedescription
      Definition

      R5: Availability.notAvailableTime.description (new:string)

      ShortR5: Reason presented to the user explaining why time not available (new)
      Comments

      Element Availability.notAvailableTime.description is part of an existing definition because parent element Availability.notAvailableTime requires a cross-version extension. Element Availability.notAvailableTime.description is not mapped to FHIR R4, since FHIR R5 Availability is not mapped. Element Availability.notAvailableTime.description has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element). The reason will generally be provided to give the textual reason for displaying when the {item} is not available, e.g. 'Closed public holidays' or 'Independence Day'. In cases such as this, the during might not be included and local knowledge would be required in such cases (as don't desire to keep updating when the holiday occurs each year).

      e.g.2: 'Closed for maintenance over the summer' for this example you would want to include the during period, unless this was a university hospital and the "summer" period was well known, but would recommend its inclusion anyway.

      Control0..1
      Requirements

      The reason that can be presented to the user as to why this time is not available. Element Availability.notAvailableTime.description is part of an existing definition because parent element Availability.notAvailableTime requires a cross-version extension. Element Availability.notAvailableTime.description is not mapped to FHIR R4, since FHIR R5 Availability is not mapped. Element Availability.notAvailableTime.description has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element).

      6. Extension.extension:description.url
      Control1..1
      Fixed Valuedescription
      8. Extension.extension:description.value[x]
      Definition

      Reason presented to the user explaining why time not available.

      ShortReason presented to the user explaining why time not available
      Comments

      The reason will generally be provided to give the textual reason for displaying when the {item} is not available, e.g. 'Closed public holidays' or 'Independence Day'. In cases such as this, the during might not be included and local knowledge would be required in such cases (as don't desire to keep updating when the holiday occurs each year).

      e.g.2: 'Closed for maintenance over the summer' for this example you would want to include the during period, unless this was a university hospital and the "summer" period was well known, but would recommend its inclusion anyway.

      Control0..1
      Typestring
      [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
      10. Extension.extension:during
      Slice Nameduring
      Definition

      R5: Availability.notAvailableTime.during (new:Period)

      ShortR5: Service not available during this period (new)
      Comments

      Element Availability.notAvailableTime.during is part of an existing definition because parent element Availability.notAvailableTime requires a cross-version extension. Element Availability.notAvailableTime.during is not mapped to FHIR R4, since FHIR R5 Availability is not mapped. Element Availability.notAvailableTime.during has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element).

      Control0..1
      Requirements

      The {item} is not available (seasonally or for a public holiday) during this period. Element Availability.notAvailableTime.during is part of an existing definition because parent element Availability.notAvailableTime requires a cross-version extension. Element Availability.notAvailableTime.during is not mapped to FHIR R4, since FHIR R5 Availability is not mapped. Element Availability.notAvailableTime.during has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element).

      12. Extension.extension:during.url
      Control1..1
      Fixed Valueduring
      14. Extension.extension:during.value[x]
      Definition

      Service not available during this period.

      ShortService not available during this period
      Control0..1
      TypePeriod
      [x] NoteSeeChoice of Data Typesfor further information about how to use [x]
      16. Extension.url
      Control1..1
      Fixed Valuehttp://hl7.org/fhir/5.0/StructureDefinition/extension-Availability.notAvailableTime
      18. Extension.value[x]
      Control0..0

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

      0. Extension
      Definition

      R5: Availability.notAvailableTime (new:Element)

      ShortR5: Not available during this time due to provided reason (new)
      Comments

      Element Availability.notAvailableTime is not mapped to FHIR R4, since FHIR R5 Availability is not mapped. Element Availability.notAvailableTime has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element).

      Control0..*
      This element is affected by the following invariants: ele-1
      Is Modifierfalse
      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())
      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.

      ShortUnique id for inter-element referencing
      Control0..1
      Typestring
      Is Modifierfalse
      XML FormatIn the XML format, this property is represented as an attribute.
      Summaryfalse
      4. Extension.extension
      Definition

      An Extension

      ShortExtension
      Control0..*
      TypeExtension
      Is Modifierfalse
      Summaryfalse
      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 Extension.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
      • value @ url
      • 6. Extension.extension:description
        Slice Namedescription
        Definition

        R5: Availability.notAvailableTime.description (new:string)

        ShortR5: Reason presented to the user explaining why time not available (new)
        Comments

        Element Availability.notAvailableTime.description is part of an existing definition because parent element Availability.notAvailableTime requires a cross-version extension. Element Availability.notAvailableTime.description is not mapped to FHIR R4, since FHIR R5 Availability is not mapped. Element Availability.notAvailableTime.description has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element). The reason will generally be provided to give the textual reason for displaying when the {item} is not available, e.g. 'Closed public holidays' or 'Independence Day'. In cases such as this, the during might not be included and local knowledge would be required in such cases (as don't desire to keep updating when the holiday occurs each year).

        e.g.2: 'Closed for maintenance over the summer' for this example you would want to include the during period, unless this was a university hospital and the "summer" period was well known, but would recommend its inclusion anyway.

        Control0..1
        TypeExtension
        Is Modifierfalse
        Summaryfalse
        Requirements

        The reason that can be presented to the user as to why this time is not available. Element Availability.notAvailableTime.description is part of an existing definition because parent element Availability.notAvailableTime requires a cross-version extension. Element Availability.notAvailableTime.description is not mapped to FHIR R4, since FHIR R5 Availability is not mapped. Element Availability.notAvailableTime.description has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element).

        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())
        8. Extension.extension:description.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
        10. Extension.extension:description.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 Extension.extension.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
        • value @ url
        • 12. Extension.extension:description.url
          Definition

          Source of the definition for the extension code - a logical name or a URL.

          Shortidentifies 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.

          Control1..1
          Typeuri
          Is Modifierfalse
          XML FormatIn the XML format, this property is represented as an attribute.
          Summaryfalse
          Fixed Valuedescription
          14. Extension.extension:description.value[x]
          Definition

          Reason presented to the user explaining why time not available.

          ShortReason presented to the user explaining why time not available
          Comments

          The reason will generally be provided to give the textual reason for displaying when the {item} is not available, e.g. 'Closed public holidays' or 'Independence Day'. In cases such as this, the during might not be included and local knowledge would be required in such cases (as don't desire to keep updating when the holiday occurs each year).

          e.g.2: 'Closed for maintenance over the summer' for this example you would want to include the during period, unless this was a university hospital and the "summer" period was well known, but would recommend its inclusion anyway.

          Control0..1
          Typestring
          [x] NoteSeeChoice of Data Typesfor further information about how to use [x]
          Is Modifierfalse
          Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
          Summaryfalse
          Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
          16. Extension.extension:during
          Slice Nameduring
          Definition

          R5: Availability.notAvailableTime.during (new:Period)

          ShortR5: Service not available during this period (new)
          Comments

          Element Availability.notAvailableTime.during is part of an existing definition because parent element Availability.notAvailableTime requires a cross-version extension. Element Availability.notAvailableTime.during is not mapped to FHIR R4, since FHIR R5 Availability is not mapped. Element Availability.notAvailableTime.during has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element).

          Control0..1
          TypeExtension
          Is Modifierfalse
          Summaryfalse
          Requirements

          The {item} is not available (seasonally or for a public holiday) during this period. Element Availability.notAvailableTime.during is part of an existing definition because parent element Availability.notAvailableTime requires a cross-version extension. Element Availability.notAvailableTime.during is not mapped to FHIR R4, since FHIR R5 Availability is not mapped. Element Availability.notAvailableTime.during has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element).

          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())
          18. Extension.extension:during.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
          20. Extension.extension:during.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 Extension.extension.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
          • value @ url
          • 22. Extension.extension:during.url
            Definition

            Source of the definition for the extension code - a logical name or a URL.

            Shortidentifies 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.

            Control1..1
            Typeuri
            Is Modifierfalse
            XML FormatIn the XML format, this property is represented as an attribute.
            Summaryfalse
            Fixed Valueduring
            24. Extension.extension:during.value[x]
            Definition

            Service not available during this period.

            ShortService not available during this period
            Control0..1
            TypePeriod
            [x] NoteSeeChoice of Data Typesfor further information about how to use [x]
            Is Modifierfalse
            Summaryfalse
            Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
            26. Extension.url
            Definition

            Source of the definition for the extension code - a logical name or a URL.

            Shortidentifies 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.

            Control1..1
            Typeuri
            Is Modifierfalse
            XML FormatIn the XML format, this property is represented as an attribute.
            Summaryfalse
            Fixed Valuehttp://hl7.org/fhir/5.0/StructureDefinition/extension-Availability.notAvailableTime
            28. Extension.value[x]
            Definition

            Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).

            ShortValue of extension
            Control0..0
            TypeChoice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, Reference, SampledData, Signature, Timing, ContactDetail, Contributor, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Dosage, Meta
            Is Modifierfalse
            Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
            Summaryfalse
            Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))