--- /dev/null
+(**************************************************************************)
+(* ___ *)
+(* ||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 *)
+(* *)
+(**************************************************************************)
+
+
+
+(* FLAT CONTEXTS
+ - Naming policy:
+ - contexts: P Q
+*)
+
+include "datatypes_defs/Proof.ma".
+include "datatypes_defs/Sequent.ma".
+
+inductive Context: Type \def
+ | leaf: Context
+ | abst: Context \to Proof \to Proof \to Sequent \to Context
+.
+(*
+definition inj: Sequent \to Context \def abst leaf.
+
+coercion cic:/matita/LOGIC/datatypes_defs/Context/inj.con.
+*)