- | TAGGED_FOLLOWING_SIBLING of StateSet.t * Tag.t
- | SELECT_CHILD of StateSet.t * Ptset.Int.t * Tree.unordered_set
- | SELECT_FOLLOWING_SIBLING of StateSet.t * Ptset.Int.t * Tree.unordered_set
+ | TAGGED_SIBLING of StateSet.t * Tag.t
+ | SELECT_CHILD of StateSet.t * Ptset.Int.t * Tree.tag_list
+ | SELECT_SIBLING of StateSet.t * Ptset.Int.t * Tree.tag_list