| SELECT_DESCENDANT of StateSet.t * Ptset.Int.t * Tree.unordered_set
| SELECT_FOLLOWING of StateSet.t * Ptset.Int.t * Tree.unordered_set
| TAGGED_CHILD of StateSet.t * Tag.t
- | TAGGED_FOLLOWING_SIBLING of StateSet.t * Tag.t
+ | TAGGED_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
+ | SELECT_SIBLING of StateSet.t * Ptset.Int.t * Tree.unordered_set
| TAGGED_SUBTREE of StateSet.t * Tag.t
| ELEMENT_SUBTREE of StateSet.t