ERA FHIR specification
1.0.0 - draft

ERA FHIR specification - Local Development build (v1.0.0) built by the FHIR (HL7® FHIR® Standard) Build Tools. See the Directory of published versions

Extension: ProductAtc - Detailed Descriptions

Draft as of 2026-04-29

Definitions for the Extension-productAtc extension.

See the documentation on how to interpret the contents of this table

0. Extension
Definition

ATC classification code for a medication product from Fimea ATC Luokitus.


Optional Extension Element - found in all resources.

ShortProduct ATC codeOptional Extensions Element
Control0..1*
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())
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..0*
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. The slices areUnordered and Open, and can be differentiated using the following discriminators:
  • value @ url
  • Slicing Note: The rules on this element (including its children) apply to all the slices, but are not repeated in them

    4. 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 Value
    {
      "url" : "https://eradocumentation.atostek.com/StructureDefinition/extension/productAtc"
    }
    <url value="https://eradocumentation.atostek.com/StructureDefinition/extension/productAtc"/>
    6. Extension.value[x]
    Definition

    ATC classification code from code system 1.2.246.537.6.32.2007 "Fimea - ATC Luokitus".


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

    ShortATC codeValue of extension
    Control10..1
    TypeCoding, date, Meta, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, SampledData, id, positiveInt, Distance, Period, 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()))
    8. Extension.value[x].system
    Definition

    The identification of the code system that defines the meaning of the symbol in the code.

    ShortIdentity of the terminology system
    Comments

    The URI may be an OID (urn:oid:...) or a UUID (urn:uuid:...). OIDs and UUIDs SHALL be references to the HL7 OID registry. Otherwise, the URI should come from HL7's list of FHIR defined special URIs or it should reference to some definition that establishes the system clearly and unambiguously.

    Control10..1
    Typeuri
    Is Modifierfalse
    Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
    Summarytrue
    Requirements

    Need to be unambiguous about the source of the definition of the symbol.

    Fixed Value
    {
      "system" : "urn:oid:1.2.246.537.6.32.2007"
    }
    <system value="urn:oid:1.2.246.537.6.32.2007"/>
    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    10. Extension.value[x].version
    Definition

    The version of the code system which was used when choosing this code. Note that a well-maintained code system does not need the version reported, because the meaning of codes is consistent across versions. However this cannot consistently be assured, and when the meaning is not guaranteed to be consistent, the version SHOULD be exchanged.

    ShortVersion of the system - if relevant
    Comments

    Where the terminology does not clearly define what string should be used to identify code system versions, the recommendation is to use the date (expressed in FHIR date format) on which that version was officially published as the version date.

    NoteThis is a business version Id, not a resource version Id (see discussion)
    Control0..01
    Typestring
    Is Modifierfalse
    Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
    Summarytrue
    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    12. Extension.value[x].code
    Definition

    A symbol in syntax defined by the system. The symbol may be a predefined code or an expression in a syntax defined by the coding system (e.g. post-coordination).

    ShortSymbol in syntax defined by the system
    Control10..1
    Typecode
    Is Modifierfalse
    Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
    Summarytrue
    Requirements

    Need to refer to a particular code in the system.

    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    14. Extension.value[x].display
    Definition

    A representation of the meaning of the code in the system, following the rules of the system.

    ShortRepresentation defined by the system
    Control10..1
    Typestring
    Is Modifierfalse
    Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
    Summarytrue
    Requirements

    Need to be able to carry a human-readable meaning of the code for readers that do not know the system.

    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    16. Extension.value[x].display.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())
    ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
    SlicingThis element introduces a set of slices on Extension.value[x].display.extension. The slices areUnordered and ClosedOpen, and can be differentiated using the following discriminators:
    • value @ url
    • Slicing Note: The rules on this element (including its children) apply to all the slices, but are not repeated in them

      18. Extension.value[x].display.extension:translation
      Slice Nametranslation
      Definition

      A translation of the ATC code display value to another language.

      ShortTranslation of the display value
      Control0..*
      This element is affected by the following invariants: ele-1
      TypeExtension(Translation) (Complex Extension)
      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())
      20. Extension.value[x].userSelected
      Definition

      Indicates that this coding was chosen by a user directly - e.g. off a pick list of available items (codes or displays).

      ShortIf this coding was chosen directly by the user
      Comments

      Amongst a set of alternatives, a directly chosen code is the most appropriate starting point for new translations. There is some ambiguity about what exactly 'directly chosen' implies, and trading partner agreement may be needed to clarify the use of this element and its consequences more completely.

      Control0..01
      Typeboolean
      Is Modifierfalse
      Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
      Summarytrue
      Requirements

      This has been identified as a clinical safety criterium - that this exact system/code pair was chosen explicitly, rather than inferred by the system based on some rules or language processing.

      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))

      See the documentation on how to interpret the contents of this table

      0. Extension
      Definition

      ATC classification code for a medication product from Fimea ATC Luokitus.

      ShortProduct ATC code
      Control0..1
      2. Extension.extension
      Control0..0
      4. Extension.url
      Fixed Value
      {
        "url" : "https://eradocumentation.atostek.com/StructureDefinition/extension/productAtc"
      }
      <url value="https://eradocumentation.atostek.com/StructureDefinition/extension/productAtc"/>
      6. Extension.value[x]
      Definition

      ATC classification code from code system 1.2.246.537.6.32.2007 "Fimea - ATC Luokitus".

      ShortATC code
      Control1..1
      TypeCoding, date, Meta, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, SampledData, id, positiveInt, Distance, Period, 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]
      8. Extension.value[x].system
      Control1..?
      Fixed Value
      {
        "system" : "urn:oid:1.2.246.537.6.32.2007"
      }
      <system value="urn:oid:1.2.246.537.6.32.2007"/>
      10. Extension.value[x].version
      NoteThis is a business version Id, not a resource version Id (see discussion)
      Control0..0
      12. Extension.value[x].code
      Control1..?
      14. Extension.value[x].display
      Control1..?
      16. Extension.value[x].display.extension
      Control0..?
      SlicingThis element introduces a set of slices on Extension.value[x].display.extension. The slices areUnordered and Closed, and can be differentiated using the following discriminators:
      • value @ url
      • Slicing Note: The rules on this element (including its children) apply to all the slices, but are not repeated in them

        18. Extension.value[x].display.extension:translation
        Slice Nametranslation
        Definition

        A translation of the ATC code display value to another language.

        ShortTranslation of the display value
        Control0..*
        TypeExtension(Translation) (Complex Extension)
        20. Extension.value[x].userSelected
        Control0..0

        See the documentation on how to interpret the contents of this table

        0. Extension
        Definition

        ATC classification code for a medication product from Fimea ATC Luokitus.

        ShortProduct ATC code
        Control0..1
        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..0
        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
        • Slicing Note: The rules on this element (including its children) apply to all the slices, but are not repeated in them

          6. 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 Value
          {
            "url" : "https://eradocumentation.atostek.com/StructureDefinition/extension/productAtc"
          }
          <url value="https://eradocumentation.atostek.com/StructureDefinition/extension/productAtc"/>
          8. Extension.value[x]
          Definition

          ATC classification code from code system 1.2.246.537.6.32.2007 "Fimea - ATC Luokitus".

          ShortATC code
          Control1..1
          TypeCoding
          [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()))
          10. Extension.value[x].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
          12. Extension.value[x].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.value[x].extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
          • value @ url
          • 14. Extension.value[x].system
            Definition

            The identification of the code system that defines the meaning of the symbol in the code.

            ShortIdentity of the terminology system
            Comments

            The URI may be an OID (urn:oid:...) or a UUID (urn:uuid:...). OIDs and UUIDs SHALL be references to the HL7 OID registry. Otherwise, the URI should come from HL7's list of FHIR defined special URIs or it should reference to some definition that establishes the system clearly and unambiguously.

            Control1..1
            Typeuri
            Is Modifierfalse
            Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
            Summarytrue
            Requirements

            Need to be unambiguous about the source of the definition of the symbol.

            Fixed Value
            {
              "system" : "urn:oid:1.2.246.537.6.32.2007"
            }
            <system value="urn:oid:1.2.246.537.6.32.2007"/>
            Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
            16. Extension.value[x].version
            Definition

            The version of the code system which was used when choosing this code. Note that a well-maintained code system does not need the version reported, because the meaning of codes is consistent across versions. However this cannot consistently be assured, and when the meaning is not guaranteed to be consistent, the version SHOULD be exchanged.

            ShortVersion of the system - if relevant
            Comments

            Where the terminology does not clearly define what string should be used to identify code system versions, the recommendation is to use the date (expressed in FHIR date format) on which that version was officially published as the version date.

            NoteThis is a business version Id, not a resource version Id (see discussion)
            Control0..0
            Typestring
            Is Modifierfalse
            Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
            Summarytrue
            Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
            18. Extension.value[x].code
            Definition

            A symbol in syntax defined by the system. The symbol may be a predefined code or an expression in a syntax defined by the coding system (e.g. post-coordination).

            ShortSymbol in syntax defined by the system
            Control1..1
            Typecode
            Is Modifierfalse
            Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
            Summarytrue
            Requirements

            Need to refer to a particular code in the system.

            Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
            20. Extension.value[x].display
            Definition

            A representation of the meaning of the code in the system, following the rules of the system.

            ShortRepresentation defined by the system
            Control1..1
            Typestring
            Is Modifierfalse
            Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
            Summarytrue
            Requirements

            Need to be able to carry a human-readable meaning of the code for readers that do not know the system.

            Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
            22. Extension.value[x].display.id
            Definition

            unique id for the element within a resource (for internal references)

            Shortxml:id (or equivalent in JSON)
            Control0..1
            Typestring
            Is Modifierfalse
            XML FormatIn the XML format, this property is represented as an attribute.
            Summaryfalse
            24. Extension.value[x].display.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.value[x].display.extension. The slices areUnordered and Closed, and can be differentiated using the following discriminators:
            • value @ url
            • Slicing Note: The rules on this element (including its children) apply to all the slices, but are not repeated in them

              26. Extension.value[x].display.extension:translation
              Slice Nametranslation
              Definition

              A translation of the ATC code display value to another language.

              ShortTranslation of the display value
              Control0..*
              This element is affected by the following invariants: ele-1
              TypeExtension(Translation) (Complex Extension)
              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())
              28. Extension.value[x].display.value
              Definition

              The actual value

              ShortPrimitive value for string
              Control0..1
              Typestring
              Is Modifierfalse
              XML FormatIn the XML format, this property is represented as an attribute.
              Summaryfalse
              Max Length:1048576
              30. Extension.value[x].userSelected
              Definition

              Indicates that this coding was chosen by a user directly - e.g. off a pick list of available items (codes or displays).

              ShortIf this coding was chosen directly by the user
              Comments

              Amongst a set of alternatives, a directly chosen code is the most appropriate starting point for new translations. There is some ambiguity about what exactly 'directly chosen' implies, and trading partner agreement may be needed to clarify the use of this element and its consequences more completely.

              Control0..0
              Typeboolean
              Is Modifierfalse
              Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
              Summarytrue
              Requirements

              This has been identified as a clinical safety criterium - that this exact system/code pair was chosen explicitly, rather than inferred by the system based on some rules or language processing.

              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))