f:Extension/f:value[x]/f:coding 1 id: maximum cardinality of 'id' is 0 system: minimum cardinality of 'system' is 1 version: maximum cardinality of 'version' is 0 code: minimum cardinality of 'code' is 1 display: minimum cardinality of 'display' is 1 userSelected: maximum cardinality of 'userSelected' is 0