Added new files for proof terms.

--- a/src/Pure/IsaMakefile	Thu Aug 30 22:51:11 2001 +0200
+++ b/src/Pure/IsaMakefile	Fri Aug 31 16:06:21 2001 +0200
@@ -38,14 +38,17 @@
   Isar/session.ML Isar/skip_proof.ML Isar/thy_header.ML Isar/toplevel.ML \
   ML-Systems/mlworks.ML ML-Systems/polyml.ML ML-Systems/polyml-3.x.ML ML-Systems/smlnj-0.93.ML	\
   ML-Systems/smlnj.ML ROOT.ML Syntax/ROOT.ML Syntax/ast.ML		\
+  Proof/ROOT.ML Proof/proofchecker.ML Proof/proof_rewrite_rules.ML	\
+  Proof/proof_syntax.ML Proof/reconstruct.ML	\
   Syntax/lexicon.ML Syntax/mixfix.ML Syntax/parser.ML			\
   Syntax/printer.ML Syntax/syn_ext.ML Syntax/syn_trans.ML		\
   Syntax/syntax.ML Syntax/token_trans.ML Syntax/type_ext.ML		\
   Thy/ROOT.ML Thy/html.ML Thy/latex.ML Thy/present.ML Thy/thm_deps.ML	\
   Thy/thm_database.ML Thy/thy_info.ML Thy/thy_load.ML Thy/thy_parse.ML	\
   Thy/thy_scan.ML Thy/thy_syn.ML axclass.ML basis.ML context.ML		\
-  deriv.ML display.ML drule.ML envir.ML goals.ML install_pp.ML		\
-  library.ML locale.ML logic.ML meta_simplifier.ML net.ML pattern.ML pure.ML pure_thy.ML	\
+  codegen.ML display.ML drule.ML envir.ML goals.ML install_pp.ML	\
+  library.ML locale.ML logic.ML meta_simplifier.ML net.ML pattern.ML	\
+  proofterm.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	Thu Aug 30 22:51:11 2001 +0200
+++ b/src/Pure/ROOT.ML	Fri Aug 31 16:06:21 2001 +0200
@@ -7,7 +7,7 @@
 *)
 
 val banner = "Pure Isabelle";
-val version = "Isabelle repository version";    (*filled in automatically!*)
+val version = "Isabelle repository";
 
 print_depth 1;
 
@@ -38,10 +38,10 @@
 use "theory.ML";
 use "theory_data.ML";
 use "context.ML";
+use "proofterm.ML";
 use "thm.ML";
 use "display.ML";
 use "pure_thy.ML";
-use "deriv.ML";
 use "drule.ML";
 use "meta_simplifier.ML";
 use "locale.ML";
@@ -50,6 +50,14 @@
 use "tactic.ML";
 use "goals.ML";
 
+(*proof term operations*)
+cd "Proof";
+use "reconstruct.ML";
+use "proof_syntax.ML";
+use "proof_rewrite_rules.ML";
+use "proofchecker.ML";
+cd "..";
+
 (*theory system operations*)
 cd "Thy"; use "ROOT.ML"; cd "..";
 
@@ -58,6 +66,9 @@
 
 use "axclass.ML";
 
+(*code generator*)
+use "codegen.ML";
+
 (*external interfaces*)
 cd "Interface"; use "ROOT.ML"; cd "..";
 
@@ -82,3 +93,4 @@
 
 print_depth 8;
 ml_prompts "ML> " "ML# ";
+