X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fcomponents%2Fng_paramodulation%2Fterms.mli;h=90ccaf5915b86d2ea7b6152ea6f766adf54f6def;hb=0b0c468aeb828f074a1b6a0195fa05216f29ee37;hp=89d6993d908ada394458ce40d97f86a0f061bc60;hpb=a872dba2b03e27967d5b9b51e950e85967340e52;p=helm.git

diff --git a/helm/software/components/ng_paramodulation/terms.mli b/helm/software/components/ng_paramodulation/terms.mli
index 89d6993d9..90ccaf591 100644
--- a/helm/software/components/ng_paramodulation/terms.mli
+++ b/helm/software/components/ng_paramodulation/terms.mli
@@ -18,7 +18,7 @@ type 'a foterm =
 
 type 'a substitution = (int * 'a foterm) list
 
-type comparison = Lt | Eq | Gt | Incomparable
+type comparison = Lt | Eq | Gt | Incomparable | Invertible
 
 type rule = Superposition | Demodulation
 
@@ -50,24 +50,35 @@ type 'a unit_clause =
  * varlist
  * 'a proof      (* proof *)
 
-type 'a passive_clause = int * 'a unit_clause (* weight * equation *)
+type 'a clause =
+    int
+    * ('a literal * bool) list (* left hand side of the arrow,
+				  with flag for selection *)
+    * ('a literal * bool) list (* right hand side of the arrow,
+				  with flag for selection *)
+    * varlist
+    * 'a proof
+
+type 'a passive_clause = int * 'a clause (* weight * equation *)
+
+val vars_of_term : ?start_acc:int list -> 'a foterm  -> int list
 
 module M : Map.S with type key = int 
 
 type 'a bag = int (* max ID  *)
-              * (('a unit_clause * bool) M.t)
+              * (('a clause * bool * int) M.t)
 
 (* also gives a fresh ID to the clause *)
     val add_to_bag : 
-          'a unit_clause -> 'a bag ->
-            'a bag * 'a unit_clause
+          'a clause -> 'a bag ->
+            'a bag * 'a clause
 
     val replace_in_bag : 
-          'a unit_clause * bool -> 'a bag ->
+          'a clause * bool * int -> 'a bag ->
             'a bag
 
     val get_from_bag : 
-          int -> 'a bag -> 'a unit_clause * bool
+          int -> 'a bag -> 'a clause * bool * int
 
     val empty_bag : 'a bag