-(**************************************************************************)
-(* ___ *)
-(* ||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 *)
-(* *)
-(**************************************************************************)
-
-include "basic_2/notation/constructors/snitem2_3.ma".
-include "basic_2/notation/constructors/star_0.ma".
-include "basic_2/notation/constructors/snabstpos_2.ma".
-include "basic_2/notation/constructors/snabbr_3.ma".
-include "basic_2/notation/constructors/snabbrpos_2.ma".
-include "basic_2/notation/constructors/snabbrneg_2.ma".
-include "alpha_1/notation/constructors/snitem1_2.ma".
-include "alpha_1/notation/constructors/snstar_2.ma".
-include "alpha_1/notation/constructors/snlref_2.ma".
-include "alpha_1/notation/constructors/sngref_2.ma".
-include "alpha_1/notation/constructors/snabstneg_1.ma".
-include "alpha_1/notation/constructors/snproj_3.ma".
-include "alpha_1/notation/constructors/snprojpos_2.ma".
-include "alpha_1/notation/constructors/snprojneg_2.ma".
-include "alpha_1/grammar/item.ma".
-
-(* TERMS ********************************************************************)
-
-(* terms *)
-inductive term: Type[0] ≝
- | TAtom: term (* atomic item construction *)
- | TUnit: item1 → term → term (* unary item construction *)
- | TPair: item2 → term → term → term (* binary item construction *)
-.
-
-interpretation "top (term)"
- 'Star = TAtom.
-
-interpretation "term construction (unary)"
- 'SnItem1 I T = (TUnit I T).
-
-interpretation "term construction (binary)"
- 'SnItem2 I T1 T2 = (TPair I T1 T2).
-
-interpretation "character (term)"
- 'SnStar k T = (TUnit (Char k) T).
-
-interpretation "local reference (term)"
- 'SnLRef i T = (TUnit (LRef i) T).
-
-interpretation "global reference (term)"
- 'SnGRef p T = (TUnit (GRef p) T).
-
-interpretation "negative abbreviation (term)"
- 'SnAbbrNeg T = (TUnit Decl T).
-
-interpretation "positive abstraction (term)"
- 'SnAbstPos T1 T2 = (TPair Abst T1 T2).
-
-interpretation "abbreviation (term)"
- 'SnAbbr a T1 T2 = (TPair (Abbr a) T1 T2).
-
-interpretation "positive abbreviation (term)"
- 'SnAbbrPos T1 T2 = (TPair (Abbr true) T1 T2).
-
-interpretation "negative abbreviation (term)"
- 'SnAbbrNeg T1 T2 = (TPair (Abbr false) T1 T2).
-
-interpretation "projection (term)"
- 'SnProj a T1 T2 = (TPair (Proj a) T1 T2).
-
-interpretation "positive projection (term)"
- 'SnProjPos T1 T2 = (TPair (Proj true) T1 T2).
-
-interpretation "negative projection (term)"
- 'SnProjNeg T1 T2 = (TPair (Proj false) T1 T2).