modules Libobject et Summary (partiel)

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@36 85f007b7-540e-0410-9357-904b9bb8a0f7

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+
+(* $Id$ *)
+
+(*i*)
+open Names
+(*i*)
+
+(* [Libobject] declares persistent objects given with three methods:
+   - a loading function, specifying what to do when the object is loaded
+     from the disk;
+   - a caching function specifying how to import the object in the current
+     scope of theory modules;
+   - a specification function, to extract its specification when writing
+     the specification of a module to the disk (.vi) *)
+
+type 'a object_declaration = {
+  load_function : 'a -> unit;
+  cache_function : section_path * 'a -> unit;
+  specification_function : 'a -> 'a }
+
+(*s given the object-name, the "loading" function, the "caching" function, 
+   and the "specification" function, the function [declare_object]
+   will hand back two functions, the "injection" and "projection"
+   functions for dynamically typed library-objects. *)
+
+type obj
+
+val declare_object : 
+  (string * 'a object_declaration) -> ('a -> obj) * (obj -> 'a)
+
+val object_tag : obj -> string
+
+val load_object : obj -> unit
+
+val cache_object : (section_path * obj) -> unit
+
+val extract_object_specification : obj -> obj