-(**************************************************************************)
-(* ___ *)
-(* ||M|| *)
-(* ||A|| A project by Andrea Asperti *)
-(* ||T|| *)
-(* ||I|| Developers: *)
-(* ||T|| The HELM team. *)
-(* ||A|| http://helm.cs.unibo.it *)
-(* \ / *)
-(* \ / This file is distributed under the terms of the *)
-(* v GNU General Public License Version 2 *)
-(* *)
-(**************************************************************************)
-
-(* THE FORMAL SYSTEM α: MATITA SOURCE FILES
- * Initial invocation : - Patience on me to gain peace and perfection! -
- * Developed since : 2014 July 25
- *)
-
-include "ground_2/lib/bool.ma".
-include "ground_2/lib/arith.ma".
-
-(* ITEMS ********************************************************************)
-
-(* unary items *)
-inductive item1: Type[0] ≝
- | Char: nat → item1 (* character: starting at 0 *)
- | LRef: nat → item1 (* reference by index: starting at 0 *)
- | GRef: nat → item1 (* reference by position: starting at 0 *)
- | Decl: item1 (* global abstraction *)
-.
-
-(* binary items *)
-inductive item2: Type[0] ≝
- | Abst: item2 (* local abstraction *)
- | Abbr: bool → item2 (* local (Ⓣ) or global (Ⓕ) abbreviation *)
- | Proj: bool → item2 (* local (Ⓣ) or global (Ⓕ) projection *)
-.