Returns an empty list if there are no nodes in the tree.
*)
-val element_by_tag : Naive_tree.t -> QNameSet.t -> Naive_tree.node list
+val element_by_tag : Naive_tree.t -> QNameSet.t -> Tree.NodeKind.t -> Naive_tree.node list
(** [element_by_tag t tag] returns all the nodes whose tag equal to [tag] in the tree [t]. *)
val compile_single_path : Xpath.Ast.single_path -> Table.query_tree
[start] the set of nodes departing.
[q] query_tree
*)
+
+val minimize_qtree : Table.query_tree -> Table.query_tree
+
+val eval_qtree : Naive_tree.t -> Naive_tree.node list ->Table.query_tree -> Naive_tree.node list