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2.1.28.7.3 Element Definition Mappings

FHIR Infrastructure icon Work GroupMaturity Level: N/AStandards Status: Informative

This page provides mappings for Element Definition (see Mappings to Other Standards for further information & status).

Many other standard frameworks define frameworks for defining "data elements". These overlap to some degree with the ElementDefinition type. This page provides general mappings between ElementDefinition and the other frameworks. One important consideration with regard to other Element definition frameworks is the scope of the definition. Many of these definition frameworks use the term "Data Element" to refer to a data item that is collected and stored with provenance, such as when it was collected, who recorded it, etc. In this specification, that's an Observation, and the definition of this kind of data element is an ObservationDefinition, or a StructureDefinition that contains several different atomic data items. An ElementDefinition in this specification is a narrower notion, solely around the characteristics of a single element, its definition, and its value domain icon. Other frameworks - especially ISO 11179 - are used in both ways, sometimes with no formal differentiation between them. For this reason, the mappings on this page are very provisional, and are provided with the intent of helping implementers understand the possible relationships.

On this page:

v2 Mappings to the V2 segment OM1 which is used to define observations (i.e. also related to ObservationDefinition)
RIM Mappings to the RIM class Observation in definition mood which is used to define observations (i.e. also related to ObservationDefinition)
IHE DEX Mappings IHE Data Element Exchange, which is closer to defining atomic data elements - still very incomplete
LOINC Mappings to the LOINC master table which defines observations - this may be relevant when the element describes an observable piece of data. This is particularly relevant in profiles of observation, and also related to ObservationDefinition
ISO 11179 Mappings to ISO 11179 which details how the ElementDefinition class relates to the ISO 11179 framework. Note that the principle differences are that FHIR does not differentiate between a Data Element and a Data Element Value, and the FHIR specification is heavily type dependent. Also, the FHIR specification includes constraints and other concerns that are outside the scope of ISO 11179

2.1.28.7.3.1 HL7 V2 Mapping (http://hl7.org/v2)

ElementDefinition OM1
    path N/A
    representation N/A
    sliceName N/A
    sliceIsConstraining N/A
    label
    code OM1.7
    slicing
        discriminator
            type
            path
        description
        ordered
        rules
    short
    definition OM1.6, OM1.41
    comment NTE, OM1.32, OM1.33, OM1.39
    requirements
    alias OM1.8, OM1.52
    min
    max OMC.10
    base
        path
        min
        max
    contentReference
    type OM1.3, OMC.9
        code OM1.3
        profile
        targetProfile
        aggregation
        versioning
    defaultValue[x]
    meaningWhenMissing
    orderMeaning
    fixed[x]
    pattern[x]
    example
        label
        value[x]
    minValue[x]
    maxValue[x]
    maxLength OMC.12
    condition
    constraint
        key
        requirements
        severity
        suppress
        human
        expression
        source
    mustHaveValue
    valueAlternatives
    mustSupport
    isModifier
    isModifierReason
    isSummary
    binding OM3, OMC.11
        strength N/A
        description
        valueSet
        additional
            purpose
            valueSet
            documentation
            shortDoco
            usage
            any
    mapping
        identity
        language
        map
        comment

2.1.28.7.3.2 RIM Mapping (http://hl7.org/v3)

ElementDefinition Observation[classCode=OBS, moodCode=DEFN]
    path N/A
    representation N/A
    sliceName N/A
    sliceIsConstraining N/A
    label ./code/display
    code ./code (root or translation)
    slicing N/A
        discriminator N/A
            type N/A
            path N/A
        description N/A
        ordered N/A
        rules N/A
    short N/A
    definition ./text
    comment ./inboundRelationship[typeCode=SUBJ]/source[classCode=LIST, moodCode=EVN]/code
    requirements ./inboundRelationship[typeCode=META]/source[classCode=ACT, moodCode=EVN, isCriterionInd=true]/reasonCode/originalText
    alias Not currently expressible
    min N/A (MIF territory)
    max N/A (MIF territory)
    base N/A (MIF territory)
        path N/A (MIF territory)
        min N/A (MIF territory)
        max N/A (MIF territory)
    contentReference N/A
    type N/A (MIF territory)
        code N/A (MIF territory)
        profile N/A (MIF territory)
        targetProfile N/A (MIF territory)
        aggregation N/A (MIF territory)
        versioning N/A (MIF territory)
    defaultValue[x] N/A (MIF territory)
    meaningWhenMissing N/A (MIF territory)
    orderMeaning N/A (MIF territory)
    fixed[x] N/A (MIF territory)
    pattern[x] N/A (MIF territory)
    example N/A (MIF territory)
        label N/A (MIF territory)
        value[x] N/A (MIF territory)
    minValue[x] N/A (MIF territory)
    maxValue[x] N/A (MIF territory)
    maxLength N/A (MIF territory)
    condition N/A (MIF territory)
    constraint N/A (MIF territory)
        key N/A (MIF territory)
        requirements N/A (MIF territory)
        severity N/A (MIF territory)
        suppress N/A (MIF territory)
        human N/A (MIF territory)
        expression N/A (MIF territory)
        source N/A (MIF territory)
    mustSupport N/A (MIF territory)
    isModifier N/A (MIF territory)
    isModifierReason N/A (MIF territory)
    isSummary N/A (MIF territory)
    binding N/A (MIF territory)
        strength N/A (MIF territory)
        description N/A (MIF territory)
        valueSet N/A (MIF territory)
    mapping N/A (MIF territory)
        identity N/A (MIF territory)
        language N/A (MIF territory)
        map N/A (MIF territory)
        comment N/A (MIF territory)

2.1.28.7.3.3 IHE Data Element Exchange (DEX) (http://ihe.net/data-element-exchange)

ElementDefinition RetrieveMetadata response
    path
    representation
    sliceName
    sliceIsConstraining
    label
    code
    slicing
        discriminator
            type
            path
        description
        ordered
        rules
    short
    definition
    comment
    requirements
    alias
    min
    max
    base
        path
        min
        max
    contentReference
    type valueDomain.dataType
        code
        profile
        targetProfile
        aggregation
        versioning
    defaultValue[x]
    meaningWhenMissing
    orderMeaning
    fixed[x]
    pattern[x]
    example
        label
        value[x]
    minValue[x]
    maxValue[x]
    maxLength
    condition
    constraint
        key
        requirements
        severity
        suppress
        human
        expression
        source
    mustHaveValue
    valueAlternatives
    mustSupport
    isModifier
    isModifierReason
    isSummary
    binding
        strength
        description
        valueSet valueDomain.valueSet
        additional
            purpose
            valueSet
            documentation
            shortDoco
            usage
            any
    mapping mappingSpecification
        identity
        language
        map
        comment

2.1.28.7.3.4 ISO 11179 (http://metadata-standards.org/11179/)

ElementDefinition Data_Element
    path Name, Identifier & Context
    representation n/a
    sliceName n/a
    sliceIsConstraining n/a
    label n/a
    code (Data_Element).data_element_concept.identifier
    slicing n/a
        discriminator n/a
            type
            path n/a
        description
        ordered n/a
        rules n/a
    short N/A
    definition (Designatable_Item).definition.text acceptability=preferred in default context
    comment (Administered_Item).explanatory_comment
    requirements (Registered_item).document_reference[document_type=requirements].notation
    alias (Designatable_Item).designation.sign acceptability!=preferred or context is other than default
    min Minimum size of data element values?
    max Maximum size of data element values?
    base n/a
        path n/a
        min n/a
        max n/a
    contentReference
    type .domain.data+Q14type
        code .domain.data+Q14type
        profile n/a
        targetProfile n/a
        aggregation n/a
        versioning
    defaultValue[x]
    meaningWhenMissing
    orderMeaning
    fixed[x] N/A (only relevant when constraining, which 11179 doesn't do)
    pattern[x]
    example
        label
        value[x] .example
    minValue[x]
    maxValue[x]
    maxLength .domain.maximum_character_quantity
    condition
    constraint ??
        key
        requirements
        severity
        suppress
        human
        expression
        source
    mustHaveValue
    valueAlternatives
    mustSupport ??
    isModifier ??
    isModifierReason
    isSummary ??
    binding .domain
        strength
        description .domain.description
        valueSet points to explicit list or expression that evaluates to list of (Enumerated_Value_Domain).member
        additional
            purpose
            valueSet
            documentation
            shortDoco
            usage
            any
    mapping Registered_item).document_reference[document_type=mapping] Also, .meaning linkage to Data_Element_Concept is done as a mapping to a reference model. (Data_Element_Concepts are all defined in some sort of reference model, be that Object_Class and Property or some other mechanism)
        identity
        language
        map ObjectClass, Property (this is one possible data model that can be mapped to - the uri would identify the data model mappingSpecification.mappingScript
        comment