description: 'R5: `DiagnosticReport.composition` (new:Reference(Composition))' package_name: hl7.fhir.uv.xver-r5.r4b derivation: constraint name: ExtensionDiagnosticReport_Composition type: Extension elements: url: base: {max: '1', min: 1, path: Extension.url} pattern: {type: Uri, value: 'http://hl7.org/fhir/5.0/StructureDefinition/extension-DiagnosticReport.composition'} index: 0 value: short: Reference to a Composition resource for the DiagnosticReport structure choices: [valueReference] base: {max: '1', min: 0, path: 'Extension.value[x]'} index: 2 valueReference: short: Reference to a Composition resource for the DiagnosticReport structure refers: ['http://hl7.org/fhir/5.0/StructureDefinition/profile-Composition|0.1.0', 'http://hl7.org/fhir/StructureDefinition/Composition|4.3.0'] type: Reference base: {max: '1', min: 0, path: 'Extension.value[x]'} choiceOf: value index: 3 package_version: 0.1.0 class: extension kind: complex-type url: http://hl7.org/fhir/5.0/StructureDefinition/extension-DiagnosticReport.composition base: http://hl7.org/fhir/StructureDefinition/Extension|4.3.0 version: 0.1.0 required: [url]