--- /dev/null
+(*
+ ||M|| This file is part of HELM, an Hypertextual, Electronic
+ ||A|| Library of Mathematics, developed at the Computer Science
+ ||T|| Department, University of Bologna, Italy.
+ ||I||
+ ||T|| HELM is free software; you can redistribute it and/or
+ ||A|| modify it under the terms of the GNU General Public License
+ \ / version 2 or (at your option) any later version.
+ \ / This software is distributed as is, NO WARRANTY.
+ V_______________________________________________________________ *)
+
+type uri = Entity.uri
+type id = Entity.id
+
+type term = Sort of bool (* sorts: true = TYPE, false = PROP *)
+ | LRef of int * int (* local reference: local environment length, de bruijn index *)
+ | GRef of int * uri * term list (* global reference: local environment length, name, arguments *)
+ | Appl of term * term (* application: argument, function *)
+ | Abst of id * term * term (* abstraction: name, domain, scope *)
+
+type pars = (id * term) list (* parameter declarations: name, type *)
+
+type entry = pars * term * term option (* parameters, domain, body *)
+
+type entity = entry Entity.entity