f:Flag category: minimum cardinality of 'category' is 1 f:Flag/f:code id: maximum cardinality of 'id' is 1 text: maximum cardinality of 'text' is 1 f:Flag/f:period id: maximum cardinality of 'id' is 1 start: maximum cardinality of 'start' is 1 end: maximum cardinality of 'end' is 1