f:Specimen/f:subject id: maximum cardinality of 'id' 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 f:Specimen/f:collection collected[x]: minimum cardinality of 'collected[x]' is 1 quantity: minimum cardinality of 'quantity' is 1 method: minimum cardinality of 'method' is 1