Choices
This is a draft specification. It is likely that changes will still be made before the final specification.
facet_choice = element choice {
attribute key { xsd:NMTOKEN },
facet_title,
facet_case +
}
facet_title = element title {
mal_inline
}
facet_case = element case {
attribute values { xsd:NMTOKENS } ?
mal_inline
}