description: This cross-version extension represents Practitioner.communication.extension from http://hl7.org/fhir/StructureDefinition/Practitioner|5.0.0 for use in FHIR R4. package_name: hl7.fhir.uv.xver-r5.r4 derivation: constraint name: ext_R5_Practitioner_co_extension type: Extension elements: url: pattern: {type: uri, value: 'http://hl7.org/fhir/5.0/StructureDefinition/extension-Practitioner.communication.extension'} type: uri index: 0 package_version: 0.0.1-snapshot-1 class: extension kind: complex-type url: http://hl7.org/fhir/5.0/StructureDefinition/extension-Practitioner.communication.extension base: http://hl7.org/fhir/StructureDefinition/Extension version: 0.0.1-snapshot-1 required: [url]