<StructureDefinition xmlns="http://hl7.org/fhir">
  <url value="http://electronichealth.se/fhir/StructureDefinition/DocumentRefId" />
  <name value="DocumentRefId" />
  <status value="draft" />
  <description value="This extensions defines a reference to a document, e.g. document number" />
  <fhirVersion value="4.0.0" />
  <kind value="complex-type" />
  <abstract value="false" />
  <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.value[x]:valueString">
      <path value="Extension.valueString" />
      <sliceName value="valueString" />
      <type>
        <code value="string" />
      </type>
    </element>
  </differential>
</StructureDefinition>