+(* given an uri, it gives back the uri of its univgraph *)
+val univgraphuri_of_uri : uri -> uri
+
+(* builder for MutInd and MutConstruct URIs
+ * [uri] -> [typeno] -> [consno option]
+ *)
+val uri_of_uriref : uri -> int -> int option -> uri
+
+module UriSet: Set.S with type elt = uri
+
+module UriHashtbl : Hashtbl.S with type key = uri
+