description: Record details about the anatomical location of a specimen or body part. This resource may be used when a coded concept does not provide the necessary detail needed for the use case. package_name: rs/hl7.fhir.r5.examples derivation: constraint name: BodyStructure Reference type: Extension elements: extension: {index: 0} url: pattern: {type: uri, value: 'http://hl7.org/fhir/StructureDefinition/bodySite'} type: uri index: 1 value: choices: [valueReference] index: 3 valueReference: type: Reference choiceOf: value refers: ['http://hl7.org/fhir/StructureDefinition/BodyStructure'] index: 4 package_version: 4.5.0 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/bodySite base: http://hl7.org/fhir/StructureDefinition/Extension version: 4.5.0 required: [value, valueReference]