f:Coverage/f:identifier
id: maximum cardinality of 'id' is 1
use: maximum cardinality of 'use' is 1
type: maximum cardinality of 'type' is 1
system: maximum cardinality of 'system' is 1
value: minimum cardinality of 'value' is 1
value: maximum cardinality of 'value' is 1
period: maximum cardinality of 'period' is 1
assigner: maximum cardinality of 'assigner' is 1