<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="diaryentry-v1-profile" />
  <url value="http://fhir.xt.dev/StructureDefinition/DiaryEntryV1" />
  <version value="0.0.2" />
  <name value="DiaryEntryV1" />
  <status value="draft" />
  <date value="2026-04-17T13:55:00+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="A single entry in an electronic patient diary. This could e.g. be used for tracking pain levels during treatment. Each Observation is a statement by a patient (or representative) concerning their current mental or physical state." />
  <copyright value="x-tention Informationstechnologie GmbH" />
  <fhirVersion value="4.0.1" />
  <kind value="resource" />
  <abstract value="false" />
  <type value="Observation" />
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Observation" />
  <derivation value="constraint" />
  <differential>
    <element id="Observation.text">
      <path value="Observation.text" />
      <slicing>
        <discriminator>
          <type value="value" />
          <path value="status" />
        </discriminator>
        <rules value="open" />
      </slicing>
      <short value="Formatted diary entry content" />
      <definition value="The content of the diary entry must be stored as the narrative" />
    </element>
    <element id="Observation.text:formattedContent">
      <path value="Observation.text" />
      <sliceName value="formattedContent" />
    </element>
    <element id="Observation.text:formattedContent.status">
      <path value="Observation.text.status" />
      <fixedCode value="additional" />
    </element>
    <element id="Observation.text:formattedContent.div">
      <path value="Observation.text.div" />
      <short value="Formatted Content" />
      <definition value="The actual narrative content of the DiaryEntry, using a stripped down version of XHTML. This must always be wrapped in a div element." />
    </element>
    <element id="Observation.status">
      <path value="Observation.status" />
      <short value="preliminary | final" />
    </element>
    <element id="Observation.category">
      <path value="Observation.category" />
      <slicing>
        <discriminator>
          <type value="value" />
          <path value="coding.system" />
        </discriminator>
        <discriminator>
          <type value="value" />
          <path value="coding.code" />
        </discriminator>
        <rules value="open" />
      </slicing>
    </element>
    <element id="Observation.category:simpleHealthStatus">
      <path value="Observation.category" />
      <sliceName value="simpleHealthStatus" />
    </element>
    <element id="Observation.category:simpleHealthStatus.coding">
      <path value="Observation.category.coding" />
      <min value="1" />
      <max value="1" />
    </element>
    <element id="Observation.category:simpleHealthStatus.coding.system">
      <path value="Observation.category.coding.system" />
      <min value="1" />
      <fixedUri value="http://fhir.xt.dev/CodeSystem/SimpleHealthStatus&quot;," />
    </element>
    <element id="Observation.category:simpleHealthStatus.coding.code">
      <path value="Observation.category.coding.code" />
      <min value="1" />
    </element>
    <element id="Observation.code.coding">
      <path value="Observation.code.coding" />
      <min value="1" />
      <max value="1" />
    </element>
    <element id="Observation.code.coding.system">
      <path value="Observation.code.coding.system" />
      <min value="1" />
      <fixedUri value="http://loinc.org" />
    </element>
    <element id="Observation.code.coding.version">
      <path value="Observation.code.coding.version" />
      <max value="0" />
    </element>
    <element id="Observation.code.coding.code">
      <path value="Observation.code.coding.code" />
      <min value="1" />
      <fixedCode value="66318-7" />
    </element>
    <element id="Observation.code.coding.display">
      <path value="Observation.code.coding.display" />
      <fixedString value="Diary completed" />
    </element>
    <element id="Observation.code.coding.userSelected">
      <path value="Observation.code.coding.userSelected" />
      <max value="0" />
    </element>
    <element id="Observation.code.text">
      <path value="Observation.code.text" />
      <max value="0" />
    </element>
    <element id="Observation.subject">
      <path value="Observation.subject" />
      <min value="1" />
      <type>
        <code value="Reference" />
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/Patient" />
      </type>
    </element>
    <element id="Observation.subject.reference">
      <path value="Observation.subject.reference" />
      <min value="1" />
    </element>
    <element id="Observation.effective[x]">
      <path value="Observation.effective[x]" />
      <min value="1" />
      <type>
        <code value="dateTime" />
      </type>
    </element>
    <element id="Observation.issued">
      <path value="Observation.issued" />
      <min value="1" />
    </element>
    <element id="Observation.performer">
      <path value="Observation.performer" />
      <min value="1" />
      <max value="1" />
      <type>
        <code value="Reference" />
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/Patient" />
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/RelatedPerson" />
        <aggregation value="referenced" />
      </type>
    </element>
    <element id="Observation.performer.reference">
      <path value="Observation.performer.reference" />
      <min value="1" />
    </element>
    <element id="Observation.value[x]">
      <path value="Observation.value[x]" />
      <min value="1" />
      <type>
        <code value="string" />
      </type>
    </element>
    <element id="Observation.note">
      <path value="Observation.note" />
      <min value="1" />
      <max value="1" />
    </element>
    <element id="Observation.note.author[x]">
      <path value="Observation.note.author[x]" />
      <max value="0" />
    </element>
    <element id="Observation.note.time">
      <path value="Observation.note.time" />
      <max value="0" />
    </element>
    <element id="Observation.note.text">
      <path value="Observation.note.text" />
      <short value="Plain text entry title" />
      <definition value="Must not use any formatting, despite the markdown data type." />
    </element>
  </differential>
</StructureDefinition>