<status value="active" /> <experimental value="false" /> <date value="2024-08-14" /> <publisher value="gematik GmbH" /> <description value="This unique identifier is generated within the Medication Service. It is either a hash derived from a specific set of data elements of the Medication resource or a direct repetition of a single data element. This identifier ensures the distinct identification of Medication resources across the ePA system." /> <fhirVersion value="4.0.1" /> <kind value="complex-type" /> <abstract value="false" /> <type value="Identifier" /> <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Identifier" /> <derivation value="constraint" /> <differential> <element id="Identifier.system"> <path value="Identifier.system" /> <min value="1" /> <patternUri value="https://gematik.de/fhir/epa-medication/sid/epa-medication-unique-identifier" /> <mustSupport value="true" /> </element> <element id="Identifier.value"> <path value="Identifier.value" /> <min value="1" /> <mustSupport value="true" /> </element> </differential> </StructureDefinition>