--- /dev/null
+(* Copyright (C) 2000, HELM Team.
+ *
+ * This file is part of HELM, an Hypertextual, Electronic
+ * Library of Mathematics, developed at the Computer Science
+ * Department, University of Bologna, Italy.
+ *
+ * HELM is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * HELM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with HELM; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ *
+ * For details, see the HELM World-Wide-Web page,
+ * http://cs.unibo.it/helm/.
+ *)
+
+type local = bool
+
+type inline_kind = Con | Ind | Var
+
+type source = string
+
+type prefix = string
+
+type item = Heading of (string * int)
+ | Line of string
+ | Comment of string
+ | Unexport of string
+ | BaseUri of string
+ | Include of string
+ | Coercion of (local * string)
+ | Notation of (local * string)
+ | Section of (local * string * string)
+ | Inline of (local * inline_kind * source * prefix)
+ | Verbatim of string
+ | Discard of string
+
+type items = item list