description: Defines the minimum set of attributes which an application wanting to share observation content must support package_name: hl7.fhir.uv.fhircast derivation: constraint name: FHIRcastObservation type: Observation elements: subject: {index: 0} hasMember: {mustSupport: true, index: 1} derivedFrom: {mustSupport: true, index: 2} package_version: 3.0.0-ballot class: profile kind: resource url: http://hl7.org/fhir/uv/fhircast/StructureDefinition/fhircast-observation base: http://hl7.org/fhir/StructureDefinition/Observation version: 3.0.0-ballot required: [subject]