Release 5

This page is part of the FHIR Specification (v5.0.0: R5 - STU). This is the current published version. For a full list of available versions, see the Directory of published versions . Page versions: R5 R4B R4

Example StructureDefinition/FiveWs (XML)

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

Raw XML (canonical form + also see XML Format Specification)

Logical Model FiveWs

<?xml version="1.0" encoding="UTF-8"?>

<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="FiveWs"/> 
  <text> 
    <status value="generated"/> 
    <div xmlns="http://www.w3.org/1999/xhtml">to do</div> 
  </text> 
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status">
    <valueCode value="informative"/> 
  </extension> 
  <url value="http://hl7.org/fhir/StructureDefinition/FiveWs"/> 
  <version value="5.0.0"/> 
  <name value="FiveWs"/> 
  <title value="fivews"/> 
  <status value="draft"/> 
  <experimental value="false"/> 
  <date value="2023-03-26T15:21:02+11:00"/> 
  <publisher value="Health Level Seven International fhir"/> 
  <contact> 
    <telecom> 
      <system value="url"/> 
      <value value="http://hl7.org/fhir"/> 
    </telecom> 
  </contact> 
  <description value="Logical Model: Who What When Where Why - Common pattern for all resources that
   deals with attribution."/> 
  <jurisdiction> 
    <coding> 
      <system value="http://unstats.un.org/unsd/methods/m49/m49.htm"/> 
      <code value="001"/> 
      <display value="World"/> 
    </coding> 
  </jurisdiction> 
  <fhirVersion value="5.0.0"/> 
  <mapping> 
    <identity value="w5"/> 
    <uri value="http://hl7.org/fhir/fivews"/> 
    <name value="FiveWs Pattern Mapping"/> 
  </mapping> 
  <kind value="logical"/> 
  <abstract value="false"/> 
  <type value="FiveWs"/> 
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Base"/> 
  <snapshot> 
    <element id="FiveWs">
      <path value="FiveWs"/> 
      <short value="Who What When Where Why - Common pattern for all resources that deals with attribution"/> 
      <definition value="Who What When Where Why - Common pattern for all resources that deals with attribution."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="FiveWs"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="FiveWs.identifier">
      <path value="FiveWs.identifier"/> 
      <short value="Business Identifier"/> 
      <definition value="Business Identifier."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="FiveWs.identifier"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Identifier"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="w5"/> 
        <map value="FiveWs.identifier"/> 
      </mapping> 
    </element> 
    <element id="FiveWs.version">
      <path value="FiveWs.version"/> 
      <short value="Identifier for this version"/> 
      <definition value="Identifier for this version."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="FiveWs.version"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="string"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="w5"/> 
        <map value="FiveWs.version"/> 
      </mapping> 
    </element> 
    <element id="FiveWs.status">
      <path value="FiveWs.status"/> 
      <short value="Status Field"/> 
      <definition value="Status Field."/> 
      <alias value="fulfills"/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="FiveWs.status"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="code"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <isModifier value="true"/> 
      <isModifierReason value="This is labeled as &quot;Is Modifier&quot; because applications should not use
       a retired CodeSystem without due consideration"/> 
      <isSummary value="false"/> 
      <binding> 
        <extension url="http://hl7.org/fhir/tools/StructureDefinition/binding-definition">
          <valueString value="Status Field."/> 
        </extension> 
        <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
          <valueString value="CanonicalStatus"/> 
        </extension> 
        <strength value="required"/> 
        <description value="Status Field."/> 
        <valueSet value="http://hl7.org/fhir/ValueSet/resource-status|5.0.0"/> 
      </binding> 
      <mapping> 
        <identity value="w5"/> 
        <map value="FiveWs.status"/> 
      </mapping> 
    </element> 
    <element id="FiveWs.class">
      <path value="FiveWs.class"/> 
      <short value="Classifier Field"/> 
      <definition value="Classifier Field."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="FiveWs.class"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="CodeableConcept"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="w5"/> 
        <map value="FiveWs.class"/> 
      </mapping> 
    </element> 
    <element id="FiveWs.grade">
      <path value="FiveWs.grade"/> 
      <short value="A field that indicates the potential impact of the content of the resource"/> 
      <definition value="A field that indicates the potential impact of the content of the resource."/> 
      <alias value="container"/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="FiveWs.grade"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="CodeableConcept"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="FiveWs.what[x]">
      <path value="FiveWs.what[x]"/> 
      <short value="What this resource is about"/> 
      <definition value="what this resource is about."/> 
      <alias value="Suspended Reason"/> 
      <alias value="Cancelled Reason"/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="FiveWs.what[x]"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="CodeableConcept"/> 
      </type> 
      <type> 
        <code value="Reference"/> 
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/Resource"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="w5"/> 
        <map value="FiveWs.what[x]"/> 
      </mapping> 
    </element> 
    <element id="FiveWs.subject">
      <path value="FiveWs.subject"/> 
      <short value="Who this resource is about"/> 
      <definition value="Who this resource is about."/> 
      <alias value="type"/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="FiveWs.subject"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Reference"/> 
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/Patient"/> 
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/Practitioner"/> 
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/RelatedPerson"/> 
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/Organization"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="w5"/> 
        <map value="FiveWs.subject[x]"/> 
      </mapping> 
    </element> 
    <element id="FiveWs.context">
      <path value="FiveWs.context"/> 
      <short value="Context for the work described in this resource"/> 
      <definition value="a resource that gives context for the work described in this resource (usually
       Encounter or EpisodeOfCare)."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="FiveWs.context"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="Reference"/> 
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/Encounter"/> 
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/EpisodeOfCare"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="FiveWs.init">
      <path value="FiveWs.init"/> 
      <short value="When the work described in this resource was started (or will be)"/> 
      <definition value="when the work described in this resource was started (or will be)."/> 
      <alias value="patient"/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="FiveWs.init"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="dateTime"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="w5"/> 
        <map value="FiveWs.init"/> 
      </mapping> 
    </element> 
    <element id="FiveWs.planned">
      <path value="FiveWs.planned"/> 
      <short value="When this resource is planned to occur"/> 
      <definition value="when this resource is planned to occur."/> 
      <alias value="encounter"/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="FiveWs.planned"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Timing"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="w5"/> 
        <map value="FiveWs.planned"/> 
      </mapping> 
    </element> 
    <element id="FiveWs.done[x]">
      <path value="FiveWs.done[x]"/> 
      <short value="When the work described in this resource was completed (or will be)"/> 
      <definition value="when the work described in this resource was completed (or will be)."/> 
      <alias value="timing"/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="FiveWs.done[x]"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="dateTime"/> 
      </type> 
      <type> 
        <code value="Period"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="w5"/> 
        <map value="FiveWs.done[x]"/> 
      </mapping> 
    </element> 
    <element id="FiveWs.recorded">
      <path value="FiveWs.recorded"/> 
      <short value="When this resource itself was created"/> 
      <definition value="when this resource itself was created."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="FiveWs.recorded"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="instant"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="w5"/> 
        <map value="FiveWs.recorded"/> 
      </mapping> 
    </element> 
    <element id="FiveWs.author">
      <path value="FiveWs.author"/> 
      <short value="Who authored the content of the resource"/> 
      <definition value="who authored the content of the resource."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="FiveWs.author"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Reference"/> 
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/Patient"/> 
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/Practitioner"/> 
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/RelatedPerson"/> 
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/Organization"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="w5"/> 
        <map value="FiveWs.author"/> 
      </mapping> 
    </element> 
    <element id="FiveWs.source">
      <path value="FiveWs.source"/> 
      <short value="Who provided the information in this resource"/> 
      <definition value="Who provided the information in this resource."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="FiveWs.source"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Reference"/> 
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/Patient"/> 
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/Practitioner"/> 
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/RelatedPerson"/> 
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/Organization"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="w5"/> 
        <map value="FiveWs.source"/> 
      </mapping> 
    </element> 
    <element id="FiveWs.actor">
      <path value="FiveWs.actor"/> 
      <short value="Who did the work described the resource (or will do)"/> 
      <definition value="who did the work described the resource (or will do)."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="FiveWs.actor"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Reference"/> 
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/Patient"/> 
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/Practitioner"/> 
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/RelatedPerson"/> 
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/Organization"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="w5"/> 
        <map value="FiveWs.actor"/> 
      </mapping> 
    </element> 
    <element id="FiveWs.cause">
      <path value="FiveWs.cause"/> 
      <short value="Who prompted the work described in the resource"/> 
      <definition value="who prompted the work described in the resource."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="FiveWs.cause"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Reference"/> 
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/Patient"/> 
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/Practitioner"/> 
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/RelatedPerson"/> 
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/Organization"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="w5"/> 
        <map value="FiveWs.cause"/> 
      </mapping> 
    </element> 
    <element id="FiveWs.witness">
      <path value="FiveWs.witness"/> 
      <short value="Who attests to the content of the resource (individual or org)"/> 
      <definition value="who attests to the content of the resource (individual or org)."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="FiveWs.witness"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Reference"/> 
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/Patient"/> 
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/Practitioner"/> 
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/RelatedPerson"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="w5"/> 
        <map value="FiveWs.witness"/> 
      </mapping> 
    </element> 
    <element id="FiveWs.who">
      <path value="FiveWs.who"/> 
      <short value="An actor involved in the work described by this resource"/> 
      <definition value="An actor involved in the work described by this resource."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="FiveWs.who"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Reference"/> 
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/Patient"/> 
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/Practitioner"/> 
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/RelatedPerson"/> 
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/Organization"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="w5"/> 
        <map value="FiveWs.who"/> 
      </mapping> 
    </element> 
    <element id="FiveWs.where[x]">
      <path value="FiveWs.where[x]"/> 
      <short value="The location of the work described"/> 
      <definition value="The location of the work described."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="FiveWs.where[x]"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="CodeableConcept"/> 
      </type> 
      <type> 
        <code value="Reference"/> 
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/Location"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="w5"/> 
        <map value="FiveWs.where[x]"/> 
      </mapping> 
    </element> 
    <element id="FiveWs.why[x]">
      <path value="FiveWs.why[x]"/> 
      <short value="Why this work was done"/> 
      <definition value="Why this work was done."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="FiveWs.why[x]"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="CodeableConcept"/> 
      </type> 
      <type> 
        <code value="Reference"/> 
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/Resource"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="w5"/> 
        <map value="FiveWs.why[x]"/> 
      </mapping> 
    </element> 
  </snapshot> 
</StructureDefinition>

Usage note: every effort has been made to ensure that the examples are correct and useful, but they are not a normative part of the specification.