description: This cross-version extension represents Practitioner.communication.id from http://hl7.org/fhir/StructureDefinition/Practitioner|5.0.0 for use in FHIR R4B. package_name: rs/hl7.fhir.uv.xver derivation: constraint name: ext_R5_Practitioner_co_id type: Extension elements: value: base: {path: 'Extension.value[x]'} short: Unique id for inter-element referencing choices: [valueId] index: 1 valueId: base: {path: 'Extension.value[x]'} type: id short: Unique id for inter-element referencing choiceOf: value index: 2 url: pattern: {type: uri, value: 'http://hl7.org/fhir/5.0/StructureDefinition/extension-Practitioner.communication.id'} type: uri index: 3 package_version: r5.r4b-0.0.1-snapshot-1 class: extension kind: complex-type url: http://hl7.org/fhir/5.0/StructureDefinition/extension-Practitioner.communication.id base: http://hl7.org/fhir/StructureDefinition/Extension version: 0.0.1-snapshot-1 required: [url]