diff -r 63c73f461eec -r 095f4963beed src/Pure/morphism.ML
--- a/src/Pure/morphism.ML	Fri Nov 24 22:05:16 2006 +0100
+++ b/src/Pure/morphism.ML	Fri Nov 24 22:05:17 2006 +0100
@@ -20,17 +20,19 @@
   val name: morphism -> string -> string
   val typ: morphism -> typ -> typ
   val term: morphism -> term -> term
+  val fact: morphism -> thm list -> thm list
   val thm: morphism -> thm -> thm
   val morphism:
    {name: string -> string,
     var: string * mixfix -> string * mixfix,
     typ: typ -> typ,
     term: term -> term,
-    thm: thm -> thm} -> morphism
+    fact: thm list -> thm list} -> morphism
   val name_morphism: (string -> string) -> morphism
   val var_morphism: (string * mixfix -> string * mixfix) -> morphism
   val typ_morphism: (typ -> typ) -> morphism
   val term_morphism: (term -> term) -> morphism
+  val fact_morphism: (thm list -> thm list) -> morphism
   val thm_morphism: (thm -> thm) -> morphism
   val identity: morphism
   val comp: morphism -> morphism -> morphism
@@ -44,29 +46,31 @@
   var: string * mixfix -> string * mixfix,
   typ: typ -> typ,
   term: term -> term,
-  thm: thm -> thm};
+  fact: thm list -> thm list};
 
 fun name (Morphism {name, ...}) = name;
 fun var (Morphism {var, ...}) = var;
 fun typ (Morphism {typ, ...}) = typ;
 fun term (Morphism {term, ...}) = term;
-fun thm (Morphism {thm, ...}) = thm;
+fun fact (Morphism {fact, ...}) = fact;
+val thm = singleton o fact;
 
 val morphism = Morphism;
 
-fun name_morphism name = morphism {name = name, var = I, typ = I, term = I, thm = I};
-fun var_morphism var = morphism {name = I, var = var, typ = I, term = I, thm = I};
-fun typ_morphism typ = morphism {name = I, var = I, typ = typ, term = I, thm = I};
-fun term_morphism term = morphism {name = I, var = I, typ = I, term = term, thm = I};
-fun thm_morphism thm = morphism {name = I, var = I, typ = I, term = I, thm = thm};
+fun name_morphism name = morphism {name = name, var = I, typ = I, term = I, fact = I};
+fun var_morphism var = morphism {name = I, var = var, typ = I, term = I, fact = I};
+fun typ_morphism typ = morphism {name = I, var = I, typ = typ, term = I, fact = I};
+fun term_morphism term = morphism {name = I, var = I, typ = I, term = term, fact = I};
+fun fact_morphism fact = morphism {name = I, var = I, typ = I, term = I, fact = fact};
+fun thm_morphism thm = morphism {name = I, var = I, typ = I, term = I, fact = map thm};
 
-val identity = morphism {name = I, var = I, typ = I, term = I, thm = I};
+val identity = morphism {name = I, var = I, typ = I, term = I, fact = I};
 
 fun comp
-    (Morphism {name = name1, var = var1, typ = typ1, term = term1, thm = thm1})
-    (Morphism {name = name2, var = var2, typ = typ2, term = term2, thm = thm2}) =
+    (Morphism {name = name1, var = var1, typ = typ1, term = term1, fact = fact1})
+    (Morphism {name = name2, var = var2, typ = typ2, term = term2, fact = fact2}) =
   morphism {name = name1 o name2, var = var1 o var2,
-    typ = typ1 o typ2, term = term1 o term2, thm = thm1 o thm2};
+    typ = typ1 o typ2, term = term1 o term2, fact = fact1 o fact2};
 
 fun phi1 $> phi2 = comp phi2 phi1;