f:Observation
extension with URL = 'http://hl7.org/fhir/StructureDefinition/observation-secondaryFinding': maximum cardinality of 'extension' is 1
extension with URL = 'http://hl7.org/fhir/StructureDefinition/bodySite': maximum cardinality of 'extension' is 1
value[x]: maximum cardinality of 'value[x]' is 0
f:Observation/f:component
value[x]: minimum cardinality of 'value[x]' is 1