f:Ratio/f:numerator id: maximum cardinality of 'id' is 1 value: minimum cardinality of 'value' is 1 value: maximum cardinality of 'value' is 1 comparator: maximum cardinality of 'comparator' is 1 unit: maximum cardinality of 'unit' is 1 system: maximum cardinality of 'system' is 1 code: minimum cardinality of 'code' is 1 code: maximum cardinality of 'code' is 1 f:Ratio/f:denominator id: maximum cardinality of 'id' is 1 value: maximum cardinality of 'value' is 1 comparator: maximum cardinality of 'comparator' is 1 unit: maximum cardinality of 'unit' is 1 system: maximum cardinality of 'system' is 1 code: maximum cardinality of 'code' is 1