<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="task-relationship-ext" />
  <url value="http://fhir.xt.dev/StructureDefinition/TaskRelationship" />
  <version value="1.0.0" />
  <name value="TaskRelationship" />
  <status value="active" />
  <date value="2026-07-29T22:01:16.3717829+02:00" />
  <publisher value="x-tention Informationstechnologie GmbH" />
  <contact>
    <telecom>
      <system value="email" />
      <value value="fhir.profiling@x-tention.com" />
      <use value="work" />
    </telecom>
  </contact>
  <description value="Classifies the relationship of a Task to the parent task referenced in partOf. This can be used to derive status changes based on the relationship of the subtask to the parent task." />
  <copyright value="x-tention Informationstechnologie GmbH" />
  <fhirVersion value="4.0.1" />
  <kind value="complex-type" />
  <abstract value="false" />
  <context>
    <type value="element" />
    <expression value="Task.partOf" />
  </context>
  <type value="Extension" />
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Extension" />
  <derivation value="constraint" />
  <differential>
    <element id="Extension.url">
      <path value="Extension.url" />
      <fixedUri value="http://fhir.xt.dev/StructureDefinition/TaskRelationship" />
    </element>
    <element id="Extension.value[x]">
      <path value="Extension.value[x]" />
      <definition value="Code to define the relationship of the containing Task to the Task it is a partOf" />
      <min value="1" />
      <type>
        <code value="Coding" />
      </type>
    </element>
    <element id="Extension.value[x].system">
      <path value="Extension.value[x].system" />
      <min value="1" />
      <fixedUri value="http://fhir.xt.dev/CodeSystem/TaskRelatedResource" />
    </element>
    <element id="Extension.value[x].version">
      <path value="Extension.value[x].version" />
      <max value="0" />
    </element>
    <element id="Extension.value[x].code">
      <path value="Extension.value[x].code" />
      <short value="Relationship Code" />
      <min value="1" />
    </element>
    <element id="Extension.value[x].userSelected">
      <path value="Extension.value[x].userSelected" />
      <max value="0" />
    </element>
  </differential>
</StructureDefinition>