description: A logical id identifying a set of messages, which have the same recipient (considered a 'group message'). Must be supplied by the client, eg. as a UUID package_name: dk.ehealth.sundhed.fhir.ig.core derivation: constraint name: ehealth-group-id type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://ehealth.sundhed.dk/fhir/StructureDefinition/ehealth-group-id'} index: 1 value: choices: [valueString] index: 3 valueString: {type: string, choiceOf: value, index: 4} package_version: 3.5.1 extensions: {} class: extension kind: complex-type url: http://ehealth.sundhed.dk/fhir/StructureDefinition/ehealth-group-id base: http://hl7.org/fhir/StructureDefinition/Extension version: 3.5.1