description: This cross-version extension represents CapabilityStatement.messaging.supportedMessage.definition from http://hl7.org/fhir/StructureDefinition/CapabilityStatement|3.0.2 for use in FHIR R4. package_name: hl7.fhir.uv.xver-r3.r4 derivation: constraint name: Ext_R3_CapabilityStatement_me_su_definition type: Extension elements: url: base: {max: '1', min: 1, path: Extension.url} pattern: {type: Uri, value: 'http://hl7.org/fhir/3.0/StructureDefinition/extension-CapabilityStatement.messaging.supportedMessage.definition'} index: 0 value: base: {max: '1', min: 0, path: 'Extension.value[x]'} short: Message supported by this system choices: [valueReference] index: 2 valueReference: base: {max: '1', min: 0, path: 'Extension.value[x]'} type: Reference short: Message supported by this system choiceOf: value index: 3 package_version: 0.0.1-snapshot-2 class: extension kind: complex-type url: http://hl7.org/fhir/3.0/StructureDefinition/extension-CapabilityStatement.messaging.supportedMessage.definition base: http://hl7.org/fhir/StructureDefinition/Extension|4.0.1 version: 0.0.1-snapshot-2 required: [url]