description: Proposed constraints on the Observation Resource for general use. This profile sets minimum expectations for the Observation resource to represent various observations if no other, more specific profile is applicable. An observation is a measurement or assertion about a subject (person, group, device, location, or another subject). package_name: hl7.fhir.ca.baseline derivation: constraint name: ObservationProfile type: Observation elements: category: {mustSupport: true, index: 1} value: mustSupport: true choices: [] index: 9 component: index: 11 elements: code: binding: {strength: preferred, valueSet: 'http://hl7.org/fhir/ValueSet/observation-codes'} mustSupport: true index: 12 value: mustSupport: true choices: [] index: 14 dataAbsentReason: {index: 15} effectiveDateTime: {type: dateTime, mustSupport: true, choiceOf: effective, index: 6} status: {index: 0} effective: mustSupport: true choices: [effectiveDateTime, effectivePeriod] index: 5 code: binding: {strength: preferred, valueSet: 'http://hl7.org/fhir/ValueSet/observation-codes'} mustSupport: true index: 2 subject: type: Reference mustSupport: true refers: ['http://hl7.org/fhir/StructureDefinition/Device', 'http://hl7.org/fhir/StructureDefinition/Group', 'http://hl7.org/fhir/StructureDefinition/Location', 'http://hl7.org/fhir/ca/baseline/StructureDefinition/profile-patient'] index: 3 dataAbsentReason: {index: 10} effectivePeriod: {type: Period, mustSupport: true, choiceOf: effective, index: 7} package_version: 1.1.6-pre class: profile kind: resource url: http://hl7.org/fhir/ca/baseline/StructureDefinition/profile-observation base: http://hl7.org/fhir/StructureDefinition/Observation version: 1.0.0 required: [subject]