description: 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. package_name: de.gematik.epa.medication derivation: constraint name: EPAMedicationUniqueIdentifier type: Identifier elements: system: pattern: {type: Uri, value: 'https://gematik.de/fhir/epa-medication/sid/epa-medication-unique-identifier'} mustSupport: true index: 0 value: {mustSupport: true, index: 1} package_version: 1.0.2 class: complex-type kind: complex-type url: https://gematik.de/fhir/epa-medication/StructureDefinition/epa-medication-unique-identifier base: http://hl7.org/fhir/StructureDefinition/Identifier version: 1.0.2 required: [value, system]