Extensions for Using Data Elements from FHIR R4 in FHIR R5
0.1.0 - STU
Extensions for Using Data Elements from FHIR R4 in FHIR R5
0.1.0 - STU
Extensions for Using Data Elements from FHIR R4 in FHIR R5 - Downloaded Version null See the Directory of published versions
| Page standards status: Trial-use | Maturity Level: 0 |
XML representation of the ext-R4-Task.reasonReference extension.
<StructureDefinition xmlns="http://hl7.org/fhir">
<id value="ext-R4-Task.reasonReference"/>
<text>
<status value="extensions"/>
<div xmlns="http://www.w3.org/1999/xhtml"><p class="res-header-id"><b>Generated Narrative: StructureDefinition ext-R4-Task.reasonReference</b></p><a name="ext-R4-Task.reasonReference"> </a><a name="hcext-R4-Task.reasonReference"> </a><table border="0" cellpadding="0" cellspacing="0" style="border: 0px #F0F0F0 solid; font-size: 11px; font-family: verdana; vertical-align: top;"><tr style="border: 1px #F0F0F0 solid; font-size: 11px; font-family: verdana; vertical-align: top"><th style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom: 3px" class="hierarchy"><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="The logical name of the element">Name</a></th><th style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom: 3px" class="hierarchy"><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Information about the use of the element">Flags</a></th><th style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom: 3px" class="hierarchy"><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Minimum and Maximum # of times the element can appear in the instance">Card.</a></th><th style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom: 3px; width: 100px" class="hierarchy"><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Reference to the type of the element">Type</a></th><th style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom: 3px" class="hierarchy"><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Additional information about the element">Description & Constraints</a><span style="float: right"><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Legend for this format"><img src="data:image/png;base64,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" alt="doco" style="background-color: inherit"/></a></span></th></tr><tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white"><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck1.png)" class="hierarchy"><img src="tbl_spacer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_element.gif" alt="." style="background-color: white; background-color: inherit" title="Element" class="hierarchy"/> <a href="StructureDefinition-ext-R4-Task.reasonReference-definitions.html#Extension" title="R4: `Task.reasonReference` (new:Reference(Resource))">Extension</a><a name="Extension"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">0..1</td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><a href="http://hl7.org/fhir/R5/extensibility.html#Extension">Extension(5.0.0)</a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">R4: Why task is needed (new)<br/></td></tr>
<tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: #F7F7F7"><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck10.png)" class="hierarchy"><img src="tbl_spacer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_element.gif" alt="." style="background-color: #F7F7F7; background-color: inherit" title="Element" class="hierarchy"/> <a href="StructureDefinition-ext-R4-Task.reasonReference-definitions.html#Extension.url">url</a><a name="Extension.url"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">1..1</td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><a style="opacity: 0.5; opacity: 0.5" href="http://hl7.org/fhir/R5/datatypes.html#uri">uri</a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="color: darkgreen">"http://hl7.org/fhir/4.0/StructureDefinition/extension-Task.reasonReference"</span></td></tr>
<tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white"><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck00.png)" class="hierarchy"><img src="tbl_spacer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin_end.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_reference.png" alt="." style="background-color: white; background-color: inherit" title="Reference to another Resource" class="hierarchy"/> <a href="StructureDefinition-ext-R4-Task.reasonReference-definitions.html#Extension.value[x]" title="A resource reference indicating why this task needs to be performed.">value[x]</a><a name="Extension.value_x_"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">0..1</td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><a href="http://hl7.org/fhir/R5/references.html">Reference</a>(<a href="StructureDefinition-profile-Resource.html">Cross-version Profile for R4.Resource for use in FHIR R5(0.1.0)</a> | <a href="http://hl7.org/fhir/R5/resource.html">Resource</a>)</td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">Why task is needed</td></tr>
<tr><td colspan="5" class="hierarchy"><br/><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Legend for this format"><img src="data:image/png;base64,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" alt="doco" style="background-color: inherit"/> Documentation for this format</a></td></tr></table></div>
</text>
<extension
url="http://hl7.org/fhir/StructureDefinition/structuredefinition-wg">
<valueCode value="fhir"/>
</extension>
<extension url="http://hl7.org/fhir/StructureDefinition/package-source">
<extension url="packageId">
<valueId value="hl7.fhir.uv.xver-r4.r5"/>
</extension>
<extension url="version">
<valueString value="0.1.0"/>
</extension>
<extension url="uri">
<valueUri
value="http://hl7.org/fhir/uv/xver/ImplementationGuide/hl7.fhir.uv.xver-r4.r5"/>
</extension>
</extension>
<extension
url="http://hl7.org/fhir/StructureDefinition/version-specific-use">
<extension url="startFhirVersion">
<valueCode value="5.0"/>
</extension>
<extension url="endFhirVersion">
<valueCode value="5.0"/>
</extension>
</extension>
<extension
url="http://hl7.org/fhir/StructureDefinition/structuredefinition-type-characteristics">
<valueCode value="can-bind"/>
</extension>
<extension
url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm">
<valueInteger value="0">
<extension
url="http://hl7.org/fhir/StructureDefinition/structuredefinition-conformance-derivedFrom">
<valueCanonical
value="http://hl7.org/fhir/uv/xver/ImplementationGuide/hl7.fhir.uv.xver-r4.r5"/>
</extension>
</valueInteger>
</extension>
<extension
url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status">
<valueCode value="trial-use">
<extension
url="http://hl7.org/fhir/StructureDefinition/structuredefinition-conformance-derivedFrom">
<valueCanonical
value="http://hl7.org/fhir/uv/xver/ImplementationGuide/hl7.fhir.uv.xver-r4.r5"/>
</extension>
</valueCode>
</extension>
<url
value="http://hl7.org/fhir/4.0/StructureDefinition/extension-Task.reasonReference"/>
<version value="0.1.0"/>
<name value="ExtensionTask_ReasonReference"/>
<title value="R4: Why task is needed (new)"/>
<status value="active"/>
<experimental value="false"/>
<date value="2026-03-17T21:02:03.8104715+00:00"/>
<publisher value="FHIR Infrastructure"/>
<contact>
<name value="FHIR Infrastructure"/>
<telecom>
<system value="url"/>
<value value="http://www.hl7.org/Special/committees/fiwg"/>
</telecom>
</contact>
<description value="R4: `Task.reasonReference` (new:Reference(Resource))"/>
<jurisdiction>
<coding>
<system value="http://unstats.un.org/unsd/methods/m49/m49.htm"/>
<code value="001"/>
<display value="World"/>
</coding>
</jurisdiction>
<purpose
value="This extension is part of the cross-version definitions generated to enable use of the
element `Task.reasonReference` as defined in FHIR R4
in FHIR R5.
The source element is defined as:
`Task.reasonReference` 0..1 `Reference(http://hl7.org/fhir/StructureDefinition/Resource)`
Across FHIR versions, the element set has been mapped as:
* R4: `Task.reasonReference` 0..1 `Reference(http://hl7.org/fhir/StructureDefinition/Resource)`
* R4B: `Task.reasonReference` 0..1 `Reference(http://hl7.org/fhir/StructureDefinition/Resource)`
Following are the generation technical comments:
Element `Task.reasonReference` has a context of Task based on following the parent source element upwards and mapping to `Task`.
Element `Task.reasonReference` has no mapping targets in FHIR R5. Typically, this is because the element has been added (is a new element)."/>
<fhirVersion value="5.0.0"/>
<mapping>
<identity value="rim"/>
<uri value="http://hl7.org/v3"/>
<name value="RIM Mapping"/>
</mapping>
<kind value="complex-type"/>
<abstract value="false"/>
<context>
<type value="element"/>
<expression value="Task"/>
</context>
<type value="Extension"/>
<baseDefinition
value="http://hl7.org/fhir/StructureDefinition/Extension|5.0.0"/>
<derivation value="constraint"/>
<snapshot>
<extension
url="http://hl7.org/fhir/tools/StructureDefinition/snapshot-base-version">
<valueString value="5.0.0"/>
</extension>
<element id="Extension">
<path value="Extension"/>
<short value="R4: Why task is needed (new)"/>
<definition
value="R4: `Task.reasonReference` (new:Reference(Resource))"/>
<comment
value="Element `Task.reasonReference` has a context of Task based on following the parent source element upwards and mapping to `Task`.
Element `Task.reasonReference` has no mapping targets in FHIR R5. Typically, this is because the element has been added (is a new element).
Tasks might be justified based on an Observation, a Condition, a past or planned procedure, etc. This should only be included if there is no focus or if it differs from the reason indicated on the focus. Use the CodeableConcept text element in `Task.reasonCode` if the data is free (uncoded) text."/>
<min value="0"/>
<max value="1"/>
<base>
<path value="Extension"/>
<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() > id.count())"/>
<source
value="http://hl7.org/fhir/StructureDefinition/Element|5.0.0"/>
</constraint>
<constraint>
<key value="ext-1"/>
<severity value="error"/>
<human value="Must have either extensions or value[x], not both"/>
<expression value="extension.exists() != value.exists()"/>
<source
value="http://hl7.org/fhir/StructureDefinition/Extension|5.0.0"/>
</constraint>
<isModifier value="false"/>
</element>
<element id="Extension.id">
<path value="Extension.id"/>
<representation value="xmlAttr"/>
<short value="Unique id for inter-element referencing"/>
<definition
value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces."/>
<min value="0"/>
<max value="1"/>
<base>
<path value="Element.id"/>
<min value="0"/>
<max value="1"/>
</base>
<type>
<extension
url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
<valueUrl value="id"/>
</extension>
<code value="http://hl7.org/fhirpath/System.String"/>
</type>
<condition value="ele-1"/>
<isModifier value="false"/>
<isSummary value="false"/>
<mapping>
<identity value="rim"/>
<map value="n/a"/>
</mapping>
</element>
<element id="Extension.extension">
<path value="Extension.extension"/>
<slicing>
<discriminator>
<type value="value"/>
<path value="url"/>
</discriminator>
<description value="Extensions are always sliced by (at least) url"/>
<rules value="open"/>
</slicing>
<short value="Additional content defined by implementations"/>
<definition
value="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 managable, 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."/>
<comment
value="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."/>
<alias value="extensions"/>
<alias value="user content"/>
<min value="0"/>
<max value="*"/>
<base>
<path value="Element.extension"/>
<min value="0"/>
<max value="*"/>
</base>
<type>
<code value="Extension"/>
</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() > id.count())"/>
<source
value="http://hl7.org/fhir/StructureDefinition/Element|5.0.0"/>
</constraint>
<constraint>
<key value="ext-1"/>
<severity value="error"/>
<human value="Must have either extensions or value[x], not both"/>
<expression value="extension.exists() != value.exists()"/>
<source
value="http://hl7.org/fhir/StructureDefinition/Extension|5.0.0"/>
</constraint>
<isModifier value="false"/>
<isSummary value="false"/>
<mapping>
<identity value="rim"/>
<map value="n/a"/>
</mapping>
</element>
<element id="Extension.url">
<path value="Extension.url"/>
<representation value="xmlAttr"/>
<short value="identifies the meaning of the extension"/>
<definition
value="Source of the definition for the extension code - a logical name or a URL."/>
<comment
value="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."/>
<min value="1"/>
<max value="1"/>
<base>
<path value="Extension.url"/>
<min value="1"/>
<max value="1"/>
</base>
<type>
<extension
url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
<valueUrl value="uri"/>
</extension>
<code value="http://hl7.org/fhirpath/System.String"/>
</type>
<fixedUri
value="http://hl7.org/fhir/4.0/StructureDefinition/extension-Task.reasonReference"/>
<isModifier value="false"/>
<isSummary value="false"/>
<mapping>
<identity value="rim"/>
<map value="N/A"/>
</mapping>
</element>
<element id="Extension.value[x]">
<path value="Extension.value[x]"/>
<short value="Why task is needed"/>
<definition
value="A resource reference indicating why this task needs to be performed."/>
<comment
value="Tasks might be justified based on an Observation, a Condition, a past or planned procedure, etc. This should only be included if there is no focus or if it differs from the reason indicated on the focus. Use the CodeableConcept text element in `Task.reasonCode` if the data is free (uncoded) text."/>
<min value="0"/>
<max value="1"/>
<base>
<path value="Extension.value[x]"/>
<min value="0"/>
<max value="1"/>
</base>
<type>
<code value="Reference"/>
<targetProfile
value="http://hl7.org/fhir/4.0/StructureDefinition/profile-Resource|0.1.0"/>
<targetProfile
value="http://hl7.org/fhir/StructureDefinition/Resource|5.0.0"/>
</type>
<condition value="ext-1"/>
<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() > id.count())"/>
<source
value="http://hl7.org/fhir/StructureDefinition/Element|5.0.0"/>
</constraint>
<isModifier value="false"/>
<isSummary value="false"/>
<mapping>
<identity value="rim"/>
<map value="N/A"/>
</mapping>
</element>
</snapshot>
<differential>
<element id="Extension">
<path value="Extension"/>
<short value="R4: Why task is needed (new)"/>
<definition
value="R4: `Task.reasonReference` (new:Reference(Resource))"/>
<comment
value="Element `Task.reasonReference` has a context of Task based on following the parent source element upwards and mapping to `Task`.
Element `Task.reasonReference` has no mapping targets in FHIR R5. Typically, this is because the element has been added (is a new element).
Tasks might be justified based on an Observation, a Condition, a past or planned procedure, etc. This should only be included if there is no focus or if it differs from the reason indicated on the focus. Use the CodeableConcept text element in `Task.reasonCode` if the data is free (uncoded) text."/>
<min value="0"/>
<max value="1"/>
<base>
<path value="Extension"/>
<min value="0"/>
<max value="*"/>
</base>
<isModifier value="false"/>
</element>
<element id="Extension.url">
<path value="Extension.url"/>
<min value="1"/>
<max value="1"/>
<base>
<path value="Extension.url"/>
<min value="1"/>
<max value="1"/>
</base>
<fixedUri
value="http://hl7.org/fhir/4.0/StructureDefinition/extension-Task.reasonReference"/>
</element>
<element id="Extension.value[x]">
<path value="Extension.value[x]"/>
<short value="Why task is needed"/>
<definition
value="A resource reference indicating why this task needs to be performed."/>
<comment
value="Tasks might be justified based on an Observation, a Condition, a past or planned procedure, etc. This should only be included if there is no focus or if it differs from the reason indicated on the focus. Use the CodeableConcept text element in `Task.reasonCode` if the data is free (uncoded) text."/>
<min value="0"/>
<max value="1"/>
<base>
<path value="Extension.value[x]"/>
<min value="0"/>
<max value="1"/>
</base>
<type>
<code value="Reference"/>
<targetProfile
value="http://hl7.org/fhir/4.0/StructureDefinition/profile-Resource|0.1.0"/>
<targetProfile
value="http://hl7.org/fhir/StructureDefinition/Resource|5.0.0"/>
</type>
</element>
</differential>
</StructureDefinition>
IG © 2025+ FHIR Infrastructure. Package hl7.fhir.uv.xver-r4.r5#0.1.0 based on FHIR 5.0.0. Generated 2026-03-20
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