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2.30.3 2.1.27.7.3 Element Definition Mappings

FHIR Infrastructure icon Work Group Maturity Level : N/A Standards 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, it's definition, and it's 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 (i.e. - 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

2.30.3.1 2.1.27.7.3.1 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
        xpath         source
        source     mustHaveValue
    valueAlternatives
    mustSupport
    obligation
        code
        actor
        documentation
        usage
        filter
        filterDocumentation
        process
    isModifier
    isModifierReason
    isSummary
    binding OM3, OMC.11
        strength N/A
        description
        valueSet
        additional
            purpose
            valueSet
            documentation
            shortDoco
            usage
            any
    mapping
        identity
        language
        map
        comment

2.30.3.2 2.1.27.7.3.2 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)
        human         suppress N/A (MIF territory)
        expression         human N/A (MIF territory)
        xpath         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)

2.30.3.3 2.1.27.7.3.3 IHE Data Element Exchange (DEX) (http://ihe.net/data-element-exchange)

2.30.3.4 LOINC code for the element (http://loinc.org)
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
        human         suppress
        expression         human
        xpath         expression
        source
    mustSupport     isModifier     isModifierReason     isSummary     binding         strength         description     mustHaveValue
        valueSet     valueAlternatives valueDomain.valueSet     mapping mappingSpecification
        identity     mustSupport
        language     obligation
        map         code
        comment         actor
ElementDefinition         documentation
    path         usage
    representation         filter
    sliceName         filterDocumentation
    sliceIsConstraining         process
    label     isModifier
    code LOINC_NUM     slicing     isModifierReason
        discriminator     isSummary
            type     binding
            path         strength
        description
        ordered         valueSet valueDomain.valueSet
        rules         additional
    short             purpose
    definition TERM DEFINITION/DESCRIPTION(S)             valueSet     comment COMMENTS
    requirements             documentation
    alias             shortDoco RELATED NAMES (only some of these apply)
    min             usage
    max             any
    base     mapping mappingSpecification
        path         identity
        min         language
        max         map
    contentReference         comment

    type 2.1.27.7.3.4 ISO 11179 (http://metadata-standards.org/11179/) HL7_V2_DATATYPE (translation required), HL7_V3_DATATYPE (translation required)         code HL7_V2_DATATYPE (translation required), HL7_V3_DATATYPE (translation required)

ANSWER LIST, NORMATIVE ANSWER LIST n/a n/a
        profile ElementDefinition         targetProfile Data_Element
        aggregation     path Name, Identifier & Context
        versioning     representation n/a
    defaultValue[x]     sliceName n/a
    meaningWhenMissing     sliceIsConstraining n/a
    orderMeaning     label n/a
    fixed[x]     code (Data_Element).data_element_concept.identifier
    pattern[x]     slicing n/a
    example         discriminator n/a
        label             type
        value[x]             path EXMPL_ANSWERS n/a
    minValue[x]         description
    maxValue[x]         ordered n/a
    maxLength         rules n/a
    condition     short N/A
    constraint     definition (Designatable_Item).definition.text acceptability=preferred in default context
        key     comment (Administered_Item).explanatory_comment
        requirements     requirements (Registered_item).document_reference[document_type=requirements].notation
        severity     alias (Designatable_Item).designation.sign acceptability!=preferred or context is other than default
        human     min Minimum size of data element values?
        expression     max Maximum size of data element values?
        xpath     base n/a
        source         path n/a
    mustSupport         min n/a
    isModifier         max n/a
    isModifierReason     contentReference
    isSummary     type .domain.data+Q14type
    binding         code .domain.data+Q14type
        strength         profile N/A n/a
        description         targetProfile n/a
        valueSet         aggregation CODE_TABLE n/a
    mapping         versioning
        identity     defaultValue[x]
        language     meaningWhenMissing
        map     orderMeaning
        comment     fixed[x] 2.30.3.5 ISO N/A (only relevant when constraining, which 11179 (http://metadata-standards.org/11179/) ElementDefinition Data_Element doesn't do)
    path Name, Identifier & Context     pattern[x]     representation n/a
    sliceName n/a     example     sliceIsConstraining n/a
    label         label n/a     code (Data_Element).data_element_concept.identifier
    slicing         value[x] .example
        discriminator     minValue[x] n/a
            type     maxValue[x]
            path     maxLength .domain.maximum_character_quantity
        description     condition
        ordered     constraint n/a ??
        rules         key n/a     short N/A
    definition (Designatable_Item).definition.text acceptability=preferred in default context         requirements     comment (Administered_Item).explanatory_comment
    requirements (Registered_item).document_reference[document_type=requirements].notation         severity     alias (Designatable_Item).designation.sign acceptability!=preferred or context is other than default
    min Minimum size of data element values?         suppress     max Maximum size of data element values?
    base n/a         human         path n/a
        min n/a         expression         max n/a
    contentReference         source
    type .domain.data+Q14type     mustHaveValue         code .domain.data+Q14type
        profile n/a     valueAlternatives         targetProfile n/a
        aggregation     mustSupport n/a ??
        versioning     obligation
    defaultValue[x]         code
    meaningWhenMissing         actor
    orderMeaning         documentation
    fixed[x] N/A (only relevant when constraining, which 11179 doesn't do)     pattern[x]         usage
    example         filter
        label         filterDocumentation         value[x] .example
    minValue[x]         process
    maxValue[x]     isModifier     maxLength .domain.maximum_character_quantity ??
    condition     isModifierReason
    constraint     isSummary ??
        key         requirements     binding .domain
        severity         strength
        human         description .domain.description
        expression         valueSet points to explicit list or expression that evaluates to list of (Enumerated_Value_Domain).member
        xpath         additional
        source             purpose
    mustSupport             valueSet ??     isModifier ??
    isModifierReason             documentation
    isSummary ??             shortDoco     binding .domain
        strength             usage
        description .domain.description             any         valueSet points to explicit list or expression that evaluates to list of (Enumerated_Value_Domain).member
    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