<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="ValidFromProperty" />
  <url value="https://ths-greifswald.de/fhir/StructureDefinition/gics/ValidFromProperty" />
  <version value="2025.1.0" />
  <name value="ValidFromProperty" />
  <title value="ValidFromProperty" />
  <status value="active" />
  <experimental value="false" />
  <date value="2025-06-12" />
  <publisher value="Unabhängige Treuhandstelle der Universitätsmedizin Greifswald" />
  <contact>
    <name value="Unabhängige Treuhandstelle der Universitätsmedizin Greifswald" />
    <telecom>
      <system value="url" />
      <value value="https://www.ths-greifswald.de/" />
      <use value="work" />
    </telecom>
  </contact>
  <description value="Specifies the point in time from which the domain is valid." />
  <copyright value="Copyright 2020-2025 Unabhängige Treuhandstelle der Universitätsmedizin Greifswald" />
  <fhirVersion value="4.0.1" />
  <kind value="complex-type" />
  <abstract value="false" />
  <context>
    <type value="element" />
    <expression value="ResearchStudy" />
  </context>
  <context>
    <type value="element" />
    <expression value="Organization" />
  </context>
  <type value="Extension" />
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Extension" />
  <derivation value="constraint" />
  <differential>
    <element id="Extension.extension">
      <path value="Extension.extension" />
      <max value="0" />
    </element>
    <element id="Extension.url">
      <path value="Extension.url" />
      <fixedUri value="https://ths-greifswald.de/fhir/StructureDefinition/gics/ValidFromProperty" />
    </element>
    <element id="Extension.value[x]">
      <path value="Extension.value[x]" />
      <slicing>
        <discriminator>
          <type value="type" />
          <path value="$this" />
        </discriminator>
        <ordered value="false" />
        <rules value="open" />
      </slicing>
      <min value="1" />
      <type>
        <code value="date" />
      </type>
      <type>
        <code value="Duration" />
      </type>
    </element>
    <element id="Extension.value[x]:valueDuration">
      <path value="Extension.value[x]" />
      <sliceName value="valueDuration" />
      <min value="0" />
      <max value="1" />
      <type>
        <code value="Duration" />
      </type>
    </element>
    <element id="Extension.value[x]:valueDuration.value">
      <path value="Extension.value[x].value" />
      <min value="1" />
    </element>
    <element id="Extension.value[x]:valueDuration.system">
      <path value="Extension.value[x].system" />
      <min value="1" />
      <patternUri value="http://unitsofmeasure.org" />
    </element>
    <element id="Extension.value[x]:valueDuration.code">
      <path value="Extension.value[x].code" />
      <min value="1" />
    </element>
  </differential>
</StructureDefinition>