(*
- * Copyright (C) 2000, HELM Team.
+ * Copyright (C) 2003, HELM Team.
*
* This file is part of HELM, an Hypertextual, Electronic
* Library of Mathematics, developed at the Computer Science
| Xml_uri of http_getter_xml_uri
| Rdf_uri of http_getter_rdf_uri
+module StringSet = Set.Make (String)
+