f:Observation performer: maximum cardinality of 'performer' is 0 value[x]: maximum cardinality of 'value[x]' is 0 method: maximum cardinality of 'method' is 0 specimen: maximum cardinality of 'specimen' is 0 hasMember: maximum cardinality of 'hasMember' is 0 component: maximum cardinality of 'component' is 0 f:Observation/f:focus id: maximum cardinality of 'id' is 0 reference: minimum cardinality of 'reference' is 1 reference: maximum cardinality of 'reference' is 1 type: maximum cardinality of 'type' is 0 identifier: maximum cardinality of 'identifier' is 1 display: maximum cardinality of 'display' is 0