description: This cross-version extension represents Communication.payload.content[x] from http://hl7.org/fhir/StructureDefinition/Communication|5.0.0 for use in FHIR R4B. package_name: hl7.fhir.uv.xver-r5.r4b derivation: constraint name: Ext_R5_Communication_pa_content type: Extension elements: url: base: {max: '1', min: 1, path: Extension.url} pattern: {type: Uri, value: 'http://hl7.org/fhir/5.0/StructureDefinition/extension-Communication.payload.content'} index: 0 value: base: {max: '1', min: 0, path: 'Extension.value[x]'} short: Message part content choices: [valueAttachment, valueReference, valueCodeableConcept] index: 2 valueAttachment: base: {max: '1', min: 0, path: 'Extension.value[x]'} type: Attachment short: Message part content choiceOf: value index: 3 valueReference: base: {max: '1', min: 0, path: 'Extension.value[x]'} type: Reference short: Message part content choiceOf: value index: 4 valueCodeableConcept: base: {max: '1', min: 0, path: 'Extension.value[x]'} type: CodeableConcept short: Message part content choiceOf: value index: 5 package_version: 0.0.1-snapshot-2 class: extension kind: complex-type url: http://hl7.org/fhir/5.0/StructureDefinition/extension-Communication.payload.content base: http://hl7.org/fhir/StructureDefinition/Extension|4.3.0 version: 0.0.1-snapshot-2 required: [url]