removed attribute.ML;

--- a/src/Pure/IsaMakefile	Tue Jan 12 12:17:53 1999 +0100
+++ b/src/Pure/IsaMakefile	Tue Jan 12 12:28:29 1999 +0100
@@ -38,11 +38,11 @@
   Syntax/syntax.ML Syntax/token_trans.ML Syntax/type_ext.ML \
   Thy/ROOT.ML Thy/browser_info.ML Thy/context.ML Thy/thm_database.ML \
   Thy/thy_info.ML Thy/thy_parse.ML Thy/thy_read.ML Thy/thy_scan.ML \
-  Thy/thy_syn.ML Thy/use.ML attribute.ML axclass.ML basis.ML deriv.ML \
-  display.ML drule.ML envir.ML goals.ML install_pp.ML library.ML \
-  locale.ML logic.ML net.ML object_logic.ML pattern.ML pure.ML \
-  pure_thy.ML search.ML sign.ML sorts.ML tactic.ML tctical.ML term.ML \
-  theory.ML theory_data.ML thm.ML type.ML type_infer.ML unify.ML
+  Thy/thy_syn.ML Thy/use.ML axclass.ML basis.ML deriv.ML display.ML \
+  drule.ML envir.ML goals.ML install_pp.ML library.ML locale.ML \
+  logic.ML net.ML object_logic.ML pattern.ML pure.ML pure_thy.ML \
+  search.ML sign.ML sorts.ML tactic.ML tctical.ML term.ML theory.ML \
+  theory_data.ML thm.ML type.ML type_infer.ML unify.ML
 	@./mk
 
 

--- a/src/Pure/ROOT.ML	Tue Jan 12 12:17:53 1999 +0100
+++ b/src/Pure/ROOT.ML	Tue Jan 12 12:28:29 1999 +0100
@@ -39,7 +39,6 @@
 use "object_logic.ML";
 use "thm.ML";
 use "display.ML";
-use "attribute.ML";
 use "pure_thy.ML";
 use "deriv.ML";
 use "drule.ML";

--- a/src/Pure/attribute.ML	Tue Jan 12 12:17:53 1999 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,107 +0,0 @@
-(*  Title:      Pure/attribute.ML
-    ID:         $Id$
-    Author:     Markus Wenzel, TU Muenchen
-
-Theorem tags and attributes.
-*)
-
-signature BASIC_ATTRIBUTE =
-sig
-  type tag
-  type tthm
-  type 'a attribute
-  val show_tags: bool ref
-end;
-
-signature ATTRIBUTE =
-sig
-  include BASIC_ATTRIBUTE
-  val thm_of: tthm -> thm
-  val tthm_of: thm -> tthm
-  val thms_of: tthm list -> thm list
-  val tthms_of: thm list -> tthm list
-  val rule: ('a -> thm -> thm) -> 'a attribute
-  val none: 'a -> 'a * 'b attribute list
-  val no_attrs: 'a * 'b -> ('a * ('b * tag list)) * 'c attribute list
-  val no_attrss: 'a * 'b list -> ('a * ('b * tag list) list) * 'c attribute list
-  val apply: ('a * tthm) * 'a attribute list -> ('a * tthm)
-  val applys: ('a * tthm list) * 'a attribute list -> ('a * tthm list)
-  val pretty_tthm: tthm -> Pretty.T
-  val pretty_tthms: tthm list -> Pretty.T
-  val print_tthm: tthm -> unit
-  val print_tthms: tthm list -> unit
-  val tag: tag -> 'a attribute
-  val untag: tag -> 'a attribute
-  val lemma: tag
-  val assumption: tag
-  val internal: tag
-  val tag_lemma: 'a attribute
-  val tag_assumption: 'a attribute
-  val tag_internal: 'a attribute
-end;
-
-structure Attribute: ATTRIBUTE =
-struct
-
-
-(** tags and attributes **)
-
-type tag = string * string list;
-type tthm = thm * tag list;
-type 'a attribute = 'a * tthm -> 'a * tthm;
-
-fun thm_of (thm, _) = thm;
-fun tthm_of thm = (thm, []);
-
-fun thms_of ths = map thm_of ths;
-fun tthms_of ths = map tthm_of ths;
-
-fun rule f (x, (thm, _)) = (x, (f x thm, []));
-
-fun none x = (x, []);
-fun no_attrs (x, y) = ((x, (y, [])), []);
-fun no_attrss (x, ys) = ((x, map (rpair []) ys), []);
-
-
-(* apply attributes *)
-
-fun apply (x_th, atts) = Library.apply atts x_th;
-fun applys (x_ths, atts) = foldl_map (Library.apply atts) x_ths;
-
-
-(* display tagged theorems *)
-
-val show_tags = ref false;
-
-fun pretty_tag (name, args) = Pretty.strs (name :: args);
-val pretty_tags = Pretty.list "[" "]" o map pretty_tag;
-
-fun pretty_tthm (thm, tags) =
-  if null tags orelse not (! show_tags) then Pretty.quote (Display.pretty_thm thm)
-  else Pretty.block [Pretty.quote (Display.pretty_thm thm), Pretty.brk 1, pretty_tags tags];
-
-fun pretty_tthms [th] = pretty_tthm th
-  | pretty_tthms ths = Pretty.block (Pretty.fbreaks (map pretty_tthm ths));
-
-val print_tthm = Pretty.writeln o pretty_tthm;
-val print_tthms = Pretty.writeln o pretty_tthms;
-
-
-(* basic attributes *)
-
-fun tag tg (x, (thm, tags)) = (x, (thm, if tg mem tags then tags else tags @ [tg]));
-fun untag tg (x, (thm, tags)) = (x, (thm, tags \ tg));
-
-val lemma = ("lemma", []);
-val assumption = ("assumption", []);
-val internal = ("internal", []);
-fun tag_lemma x = tag lemma x;
-fun tag_assumption x = tag assumption x;
-fun tag_internal x = tag internal x;
-
-
-end;
-
-
-structure BasicAttribute: BASIC_ATTRIBUTE = Attribute;
-open BasicAttribute;