1 (**************************************************************************)
4 (* ||A|| A project by Andrea Asperti *)
6 (* ||I|| Developers: *)
7 (* ||T|| The HELM team. *)
8 (* ||A|| http://helm.cs.unibo.it *)
10 (* \ / This file is distributed under the terms of the *)
11 (* v GNU General Public License Version 2 *)
13 (**************************************************************************)
15 include "ground/arith/pnat.ma".
16 include "delayed_updating/notation/functions/nodelabel_d_1.ma".
17 include "delayed_updating/notation/functions/edgelabel_l_0.ma".
18 include "delayed_updating/notation/functions/edgelabel_a_0.ma".
19 include "delayed_updating/notation/functions/edgelabel_s_0.ma".
21 (* LABEL ********************************************************************)
23 inductive label: Type[0] ≝
24 | label_node_d: pnat → label
31 "variable reference by depth (label)"
32 'NodeLabelD p = (label_node_d p).
35 "name-free functional abstruction (label)"
36 'EdgeLabelL = (label_edge_l).
40 'EdgeLabelA = (label_edge_a).
44 'EdgeLabelS = (label_edge_s).