f:Observation identifier: maximum cardinality of 'identifier' is 0 basedOn: maximum cardinality of 'basedOn' is 0 partOf: maximum cardinality of 'partOf' is 0 category: maximum cardinality of 'category' is 0 subject: minimum cardinality of 'subject' is 1 focus: maximum cardinality of 'focus' is 0 issued: maximum cardinality of 'issued' is 0 performer: maximum cardinality of 'performer' is 0 value[x]: minimum cardinality of 'value[x]' is 1 interpretation: maximum cardinality of 'interpretation' is 0 bodySite: maximum cardinality of 'bodySite' is 0 method: maximum cardinality of 'method' is 0 specimen: maximum cardinality of 'specimen' is 0 device: maximum cardinality of 'device' is 0 referenceRange: maximum cardinality of 'referenceRange' is 0 hasMember: maximum cardinality of 'hasMember' is 0 derivedFrom: maximum cardinality of 'derivedFrom' is 0 component: maximum cardinality of 'component' is 0