description: This cross-version extension represents ResearchStudy.contact from http://hl7.org/fhir/StructureDefinition/ResearchStudy|4.3.0 for use in FHIR R5. package_name: hl7.fhir.uv.xver-r4b.r5 derivation: constraint name: ext_R4B_ResearchStudy_contact type: Extension elements: value: base: {path: 'Extension.value[x]'} short: Contact details for the study choices: [valueContactDetail] index: 1 valueContactDetail: base: {path: 'Extension.value[x]'} type: ContactDetail short: Contact details for the study choiceOf: value index: 2 url: pattern: {type: uri, value: 'http://hl7.org/fhir/4.3/StructureDefinition/extension-ResearchStudy.contact'} type: uri index: 3 package_version: 0.0.1-snapshot-1 class: extension kind: complex-type url: http://hl7.org/fhir/4.3/StructureDefinition/extension-ResearchStudy.contact base: http://hl7.org/fhir/StructureDefinition/Extension version: 0.0.1-snapshot-1 required: [url]