f:Observation subject: minimum cardinality of 'subject' is 1 effective[x]: minimum cardinality of 'effective[x]' is 1 bodySite: maximum cardinality of 'bodySite' is 0 specimen: maximum cardinality of 'specimen' is 0 device: maximum cardinality of 'device' is 0 referenceRange: maximum cardinality of 'referenceRange' is 0 component: maximum cardinality of 'component' is 0 Observation If the resource is contained in another resource, it SHALL NOT contain nested Resources (inherited) If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated (inherited) If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource (inherited) A resource should have narrative for robust management (inherited) If a resource is contained in another resource, it SHALL NOT have a security label (inherited) If Observation.code is the same as an Observation.component.code then the value element associated with the code SHALL NOT be present (inherited) dataAbsentReason SHALL only be present if Observation.value[x] is not present (inherited) f:Observation/f:meta id: maximum cardinality of 'id' is 1 versionId: maximum cardinality of 'versionId' is 1 lastUpdated: maximum cardinality of 'lastUpdated' is 1 source: maximum cardinality of 'source' is 1 Observation.code All FHIR elements must have a @value or children (inherited) f:Observation/f:subject id: maximum cardinality of 'id' is 1 reference: minimum cardinality of 'reference' is 1 reference: maximum cardinality of 'reference' is 1 type: maximum cardinality of 'type' is 1 identifier: maximum cardinality of 'identifier' is 1 display: maximum cardinality of 'display' is 1 Observation.value[x] 1 All FHIR elements must have a @value or children (inherited) Observation.referenceRange All FHIR elements must have a @value or children (inherited) Must have at least a low or a high or text (inherited) f:Observation/f:hasMember id: maximum cardinality of 'id' is 1 reference: minimum cardinality of 'reference' is 1 reference: maximum cardinality of 'reference' is 1 type: maximum cardinality of 'type' is 1 identifier: maximum cardinality of 'identifier' is 1 display: maximum cardinality of 'display' is 1 Observation.component All FHIR elements must have a @value or children (inherited)