f:Observation effective[x]: minimum cardinality of 'effective[x]' is 1 value[x]: maximum cardinality of 'value[x]' is 0 component: maximum cardinality of 'component' is 0 f:Observation/f:category id: maximum cardinality of 'id' is 1 f:Observation/f:effective[x] 1 id: maximum cardinality of 'id' is 0 start: minimum cardinality of 'start' is 1 end: minimum cardinality of 'end' is 1