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diff --git a/lisp/progmodes/ebnf-otz.el b/lisp/progmodes/ebnf-otz.el
new file mode 100644
index 00000000000..5af9ef6925c
--- /dev/null
+++ b/lisp/progmodes/ebnf-otz.el
@@ -0,0 +1,661 @@
+;;; ebnf-otz --- Syntatic chart OpTimiZer
+
+;; Copyright (C) 1999 Vinicius Jose Latorre
+
+;; Author:     Vinicius Jose Latorre <vinicius@cpqd.com.br>
+;; Maintainer: Vinicius Jose Latorre <vinicius@cpqd.com.br>
+;; Keywords:   wp, ebnf, PostScript
+;; Time-stamp: <99/11/20 18:03:10 vinicius>
+;; Version:    1.0
+
+;; This file is *NOT* (yet?) part of GNU Emacs.
+
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2, or (at your option)
+;; any later version.
+
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs; see the file COPYING.  If not, write to the
+;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
+
+;;; Commentary:
+
+;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;;
+;;
+;; This is part of ebnf2ps package.
+;;
+;; This package defines an optimizer for ebnf2ps.
+;;
+;; See ebnf2ps.el for documentation.
+;;
+;;
+;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+;;; code:
+
+
+(require 'ebnf2ps)
+
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+
+(defvar ebnf-empty-rule-list nil
+  "List of empty rule name.")
+
+
+(defun ebnf-add-empty-rule-list (rule)
+  "Add empty RULE in `ebnf-empty-rule-list'."
+  (and ebnf-ignore-empty-rule
+       (eq (ebnf-node-kind (ebnf-node-production rule))
+	   'ebnf-generate-empty)
+       (setq ebnf-empty-rule-list (cons (ebnf-node-name rule)
+					ebnf-empty-rule-list))))
+
+
+(defun ebnf-otz-initialize ()
+  "Initialize optimizer."
+  (setq ebnf-empty-rule-list nil))
+
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Eliminate empty rules
+
+
+(defun ebnf-eliminate-empty-rules (syntax-list)
+  "Eliminate empty rules."
+  (while ebnf-empty-rule-list
+    (let ((ebnf-total (length syntax-list))
+	  (ebnf-nprod 0)
+	  (prod-list syntax-list)
+	  new-list before)
+      (while prod-list
+	(ebnf-message-info "Eliminating empty rules")
+	(let ((rule (car prod-list)))
+	  ;; if any non-terminal pertains to ebnf-empty-rule-list
+	  ;; then eliminate non-terminal from rule
+	  (if (ebnf-eliminate-empty rule)
+	      (setq before prod-list)
+	    ;; eliminate empty rule from syntax-list
+	    (setq new-list (cons (ebnf-node-name rule) new-list))
+	    (if before
+		(setcdr before (cdr prod-list))
+	      (setq syntax-list (cdr syntax-list)))))
+	(setq prod-list (cdr prod-list)))
+      (setq ebnf-empty-rule-list new-list)))
+  syntax-list)
+
+
+;; [production   width-func entry height width name production action]
+;; [sequence     width-func entry height width list]
+;; [alternative  width-func entry height width list]
+;; [non-terminal width-func entry height width name default]
+;; [empty        width-func entry height width]
+;; [terminal     width-func entry height width name default]
+;; [special      width-func entry height width name default]
+
+(defun ebnf-eliminate-empty (rule)
+  (let ((kind (ebnf-node-kind rule)))
+    (cond
+     ;; non-terminal
+     ((eq kind 'ebnf-generate-non-terminal)
+      (if (member (ebnf-node-name rule) ebnf-empty-rule-list)
+	  nil
+	rule))
+     ;; sequence
+     ((eq kind 'ebnf-generate-sequence)
+      (let ((seq    (ebnf-node-list rule))
+	    (header (ebnf-node-list rule))
+	    before elt)
+	(while seq
+	  (setq elt (car seq))
+	  (if (ebnf-eliminate-empty elt)
+	      (setq before seq)
+	    (if before
+		(setcdr before (cdr seq))
+	      (setq header (cdr header))))
+	  (setq seq (cdr seq)))
+	(when header
+	  (ebnf-node-list rule header)
+	  rule)))
+     ;; alternative
+     ((eq kind 'ebnf-generate-alternative)
+      (let ((seq    (ebnf-node-list rule))
+	    (header (ebnf-node-list rule))
+	    before elt)
+	(while seq
+	  (setq elt (car seq))
+	  (if (ebnf-eliminate-empty elt)
+	      (setq before seq)
+	    (if before
+		(setcdr before (cdr seq))
+	      (setq header (cdr header))))
+	  (setq seq (cdr seq)))
+	(when header
+	  (if (= (length header) 1)
+	      (car header)
+	    (ebnf-node-list rule header)
+	    rule))))
+     ;; production
+     ((eq kind 'ebnf-generate-production)
+      (let ((prod (ebnf-eliminate-empty (ebnf-node-production rule))))
+	(when prod
+	  (ebnf-node-production rule prod)
+	  rule)))
+     ;; terminal, special and empty
+     (t
+      rule)
+     )))
+
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Optimizations
+
+
+;; *To be implemented*:
+;;    left recursion:
+;;    A = B | A C B | A C D.   ==>   A = B {C (B | D)}*.
+
+;;    right recursion:
+;;    A = B | C A.             ==>   A = {C}* B.
+;;    A = B | D | C A | E A.   ==>   A = { C | E }* ( B | D ).
+
+;;    optional:
+;;    A = B | C B.             ==>   A = [C] B.
+;;    A = B | B C.             ==>   A = B [C].
+;;    A = D | B D | B C D.     ==>   A = [B [C]] D.
+
+
+;; *Already implemented*:
+;;    left recursion:
+;;    A = B | A C.             ==>   A = B {C}*.
+;;    A = B | A B.             ==>   A = {B}+.
+;;    A =   | A B.             ==>   A = {B}*.
+;;    A = B | A C B.           ==>   A = {B || C}+.
+;;    A = B | D | A C | A E.   ==>   A = ( B | D ) { C | E }*.
+
+;;    optional:
+;;    A = B | .                ==>   A = [B].
+;;    A =   | B .              ==>   A = [B].
+
+;;    factoration:
+;;    A = B C | B D.           ==>   A = B (C | D).
+;;    A = C B | D B.           ==>   A = (C | D) B.
+;;    A = B C E | B D E.       ==>   A = B (C | D) E.
+
+;;    none:
+;;    A = B | C | .            ==>   A = B | C | .
+;;    A = B | C A D.           ==>   A = B | C A D.
+
+(defun ebnf-optimize (syntax-list)
+  "Syntatic chart optimizer."
+  (if (not ebnf-optimize)
+      syntax-list
+    (let ((ebnf-total (length syntax-list))
+	  (ebnf-nprod 0)
+	  new)
+      (while syntax-list
+	(setq new (cons (ebnf-optimize1 (car syntax-list)) new)
+	      syntax-list (cdr syntax-list)))
+      (nreverse new))))
+
+
+;; left recursion:
+;; 1.  A = B | A C.             ==>   A = B {C}*.
+;; 2.  A = B | A B.             ==>   A = {B}+.
+;; 3.  A =   | A B.             ==>   A = {B}*.
+;; 4.  A = B | A C B.           ==>   A = {B || C}+.
+;; 5.  A = B | D | A C | A E.   ==>   A = ( B | D ) { C | E }*.
+
+;; optional:
+;; 6.  A = B | .                ==>   A = [B].
+;; 7.  A =   | B .              ==>   A = [B].
+
+;; factoration:
+;; 8.  A = B C | B D.           ==>   A = B (C | D).
+;; 9.  A = C B | D B.           ==>   A = (C | D) B.
+;; 10. A = B C E | B D E.       ==>   A = B (C | D) E.
+
+(defun ebnf-optimize1 (prod)
+  (ebnf-message-info "Optimizing syntatic chart")
+  (let ((production (ebnf-node-production prod)))
+    (and (eq (ebnf-node-kind production) 'ebnf-generate-alternative)
+	 (let* ((hlist (ebnf-split-header-prefix
+			(ebnf-node-list production)
+			(ebnf-node-name prod)))
+		(nlist (car hlist))
+		(zlist (cdr hlist))
+		(elist (ebnf-split-header-suffix nlist zlist)))
+	   (ebnf-node-production
+	    prod
+	    (cond
+	     ;; cases 2., 4.
+	     (elist
+	      (and (eq elist t)
+		   (setq elist nil))
+	      (setq elist (or (ebnf-prefix-suffix elist)
+			      elist))
+	      (let* ((nl (ebnf-extract-empty nlist))
+		     (el (or (ebnf-prefix-suffix (cdr nl))
+			     (ebnf-create-alternative (cdr nl)))))
+		(if (car nl)
+		    (ebnf-make-zero-or-more el elist)
+		  (ebnf-make-one-or-more el elist))))
+	     ;; cases 1., 3., 5.
+	     (zlist
+	      (let* ((xlist (cdr (ebnf-extract-empty zlist)))
+		     (znode (ebnf-make-zero-or-more
+			     (or (ebnf-prefix-suffix xlist)
+				 (ebnf-create-alternative xlist))))
+		     (nnode (ebnf-map-list-to-optional nlist)))
+		(and nnode
+		     (setq nlist (list nnode)))
+		(if (or (null nlist)
+			(and (= (length nlist) 1)
+			     (eq (ebnf-node-kind (car nlist))
+				 'ebnf-generate-empty)))
+		    znode
+		  (ebnf-make-sequence
+		   (list (or (ebnf-prefix-suffix nlist)
+			     (ebnf-create-alternative nlist))
+			 znode)))))
+	     ;; cases 6., 7.
+	     ((ebnf-map-node-to-optional production)
+	      )
+	     ;; cases 8., 9., 10.
+	     ((ebnf-prefix-suffix nlist)
+	      )
+	     ;; none
+	     (t
+	      production)
+	     ))))
+    prod))
+
+
+(defun ebnf-split-header-prefix (node-list header)
+  (let* ((hlist (ebnf-split-header-prefix1 node-list header))
+	 (nlist (car hlist))
+	 zlist empty-p)
+    (while (setq hlist (cdr hlist))
+      (let ((elt (car hlist)))
+	(if (eq (ebnf-node-kind elt) 'ebnf-generate-sequence)
+	    (setq zlist (cons
+			 (let ((seq (cdr (ebnf-node-list elt))))
+			   (if (= (length seq) 1)
+			       (car seq)
+			     (ebnf-node-list elt seq)
+			     elt))
+			 zlist))
+	  (setq empty-p t))))
+    (and empty-p
+	 (setq zlist (cons (ebnf-make-empty)
+			   zlist)))
+    (cons nlist (nreverse zlist))))
+
+
+(defun ebnf-split-header-prefix1 (node-list header)
+  (let (hlist nlist)
+    (while node-list
+      (if (ebnf-node-equal-header (car node-list) header)
+	  (setq hlist (cons (car node-list) hlist))
+	(setq nlist (cons (car node-list) nlist)))
+      (setq node-list (cdr node-list)))
+    (cons (nreverse nlist) (nreverse hlist))))
+
+
+(defun ebnf-node-equal-header (node header)
+  (let ((kind (ebnf-node-kind node)))
+    (cond
+     ((eq kind 'ebnf-generate-sequence)
+      (ebnf-node-equal-header (car (ebnf-node-list node)) header))
+     ((eq kind 'ebnf-generate-non-terminal)
+      (string= (ebnf-node-name node) header))
+     (t
+      nil)
+     )))
+
+
+(defun ebnf-map-node-to-optional (node)
+  (and (eq (ebnf-node-kind node) 'ebnf-generate-alternative)
+       (ebnf-map-list-to-optional (ebnf-node-list node))))
+
+
+(defun ebnf-map-list-to-optional (nlist)
+  (and (= (length nlist) 2)
+       (let ((first  (nth 0 nlist))
+	     (second (nth 1 nlist)))
+	 (cond
+	  ;; empty second
+	  ((eq (ebnf-node-kind first) 'ebnf-generate-empty)
+	   (ebnf-make-optional second))
+	  ;; first empty
+	  ((eq (ebnf-node-kind second) 'ebnf-generate-empty)
+	   (ebnf-make-optional first))
+	  ;; first second
+	  (t
+	   nil)
+	  ))))
+
+
+(defun ebnf-extract-empty (elist)
+  (let ((now elist)
+	before empty-p)
+    (while now
+      (if (not (eq (ebnf-node-kind (car now)) 'ebnf-generate-empty))
+	  (setq before now)
+	(setq empty-p t)
+	(if before
+	    (setcdr before (cdr now))
+	  (setq elist (cdr elist))))
+      (setq now (cdr now)))
+    (cons empty-p elist)))
+
+
+(defun ebnf-split-header-suffix (nlist zlist)
+  (let (new empty-p)
+    (and (cond
+	  ((= (length nlist) 1)
+	   (let ((ok t)
+		 (elt (car nlist)))
+	     (while (and ok zlist)
+	       (setq ok    (ebnf-split-header-suffix1 elt (car zlist))
+		     zlist (cdr zlist))
+	       (if (eq ok t)
+		   (setq empty-p t)
+		 (setq new (cons ok new))))
+	     ok))
+	  ((= (length nlist) (length zlist))
+	   (let ((ok t))
+	     (while (and ok zlist)
+	       (setq ok    (ebnf-split-header-suffix1 (car nlist) (car zlist))
+		     nlist (cdr nlist)
+		     zlist (cdr zlist))
+	       (if (eq ok t)
+		   (setq empty-p t)
+		 (setq new (cons ok new))))
+	     ok))
+	  (t
+	   nil)
+	  )
+	 (let* ((lis (ebnf-unique-list new))
+		(len (length lis)))
+	   (cond
+	    ((zerop len)
+	     t)
+	    ((= len 1)
+	     (setq lis (car lis))
+	     (if empty-p
+		 (ebnf-make-optional lis)
+	       lis))
+	    (t
+	     (and empty-p
+		  (setq lis (cons (ebnf-make-empty) lis)))
+	     (ebnf-create-alternative (nreverse lis)))
+	    )))))
+
+
+(defun ebnf-split-header-suffix1 (ne ze)
+  (cond
+   ((eq (ebnf-node-kind ne) 'ebnf-generate-sequence)
+    (and (eq (ebnf-node-kind ze) 'ebnf-generate-sequence)
+	 (let ((nl (ebnf-node-list ne))
+	       (zl (ebnf-node-list ze))
+	       len z)
+	   (and (>= (length zl) (length nl))
+		(let ((ok t))
+		  (setq len (- (length zl) (length nl))
+			z   (nthcdr len zl))
+		  (while (and ok z)
+		    (setq ok (ebnf-node-equal (car z) (car nl))
+			  z  (cdr z)
+			  nl (cdr nl)))
+		  ok)
+		(if (zerop len)
+		    t
+		  (setcdr (nthcdr (1- len) zl) nil)
+		  ze)))))
+   ((eq (ebnf-node-kind ze) 'ebnf-generate-sequence)
+    (let* ((zl  (ebnf-node-list ze))
+	   (len (length zl)))
+      (and (ebnf-node-equal ne (car (nthcdr (1- len) zl)))
+	   (cond
+	    ((= len 1)
+	     t)
+	    ((= len 2)
+	     (car zl))
+	    (t
+	     (setcdr (nthcdr (- len 2) zl) nil)
+	     ze)
+	    ))))
+   (t
+    (ebnf-node-equal ne ze))
+   ))
+
+
+(defun ebnf-prefix-suffix (lis)
+  (and lis (listp lis)
+       (let* ((prefix (ebnf-split-prefix lis))
+	      (suffix (ebnf-split-suffix (cdr prefix)))
+	      (middle (cdr suffix)))
+	 (setq prefix (car prefix)
+	       suffix (car suffix))
+	 (and (or prefix suffix)
+	      (ebnf-make-sequence
+	       (nconc prefix
+		      (and middle
+			   (list (or (ebnf-map-list-to-optional middle)
+				     (ebnf-create-alternative middle))))
+		      suffix))))))
+
+
+(defun ebnf-split-prefix (lis)
+  (let* ((len  (length lis))
+	 (tail lis)
+	 (head (if (eq (ebnf-node-kind (car lis)) 'ebnf-generate-sequence)
+		   (ebnf-node-list (car lis))
+		 (list (car lis))))
+	 (ipre (1+ len)))
+    ;; determine prefix length
+    (while (and (> ipre 0) (setq tail (cdr tail)))
+      (let ((cur head)
+	    (this (if (eq (ebnf-node-kind (car tail)) 'ebnf-generate-sequence)
+		      (ebnf-node-list (car tail))
+		    (list (car tail))))
+	    (i 0))
+	(while (and cur this
+		    (ebnf-node-equal (car cur) (car this)))
+	  (setq cur  (cdr cur)
+		this (cdr this)
+		i    (1+ i)))
+	(setq ipre (min ipre i))))
+    (if (or (zerop ipre) (> ipre len))
+	;; no prefix at all
+	(cons nil lis)
+      (let* ((tail   (nthcdr ipre head))
+	     ;; get prefix
+	     (prefix (progn
+		       (and tail
+			    (setcdr (nthcdr (1- ipre) head) nil))
+		       head))
+	     empty-p before)
+	;; adjust first element
+	(if (or (not (eq (ebnf-node-kind (car lis)) 'ebnf-generate-sequence))
+		(null tail))
+	    (setq lis     (cdr lis)
+		  tail    lis
+		  empty-p t)
+	  (if (= (length tail) 1)
+	      (setcar lis (car tail))
+	    (ebnf-node-list (car lis) tail))
+	  (setq tail (cdr lis)))
+	;; eliminate prefix from lis based on ipre
+	(while tail
+	  (let ((elt (car tail))
+		rest)
+	    (if (and (eq (ebnf-node-kind elt) 'ebnf-generate-sequence)
+		     (setq rest (nthcdr ipre (ebnf-node-list elt))))
+		(progn
+		  (if (= (length rest) 1)
+		      (setcar tail (car rest))
+		    (ebnf-node-list elt rest))
+		  (setq before tail))
+	      (setq empty-p t)
+	      (if before
+		  (setcdr before (cdr tail))
+		(setq lis (cdr lis))))
+	    (setq tail (cdr tail))))
+	(cons prefix (ebnf-unique-list
+		      (if empty-p
+			  (nconc lis (list (ebnf-make-empty)))
+			lis)))))))
+
+
+(defun ebnf-split-suffix (lis)
+  (let* ((len  (length lis))
+	 (tail lis)
+	 (head (nreverse
+		(if (eq (ebnf-node-kind (car lis)) 'ebnf-generate-sequence)
+		    (ebnf-node-list (car lis))
+		  (list (car lis)))))
+	 (isuf (1+ len)))
+    ;; determine suffix length
+    (while (and (> isuf 0) (setq tail (cdr tail)))
+      (let* ((cur head)
+	     (tlis (nreverse
+		    (if (eq (ebnf-node-kind (car tail)) 'ebnf-generate-sequence)
+			(ebnf-node-list (car tail))
+		      (list (car tail)))))
+	     (this tlis)
+	     (i 0))
+	(while (and cur this
+		    (ebnf-node-equal (car cur) (car this)))
+	  (setq cur  (cdr cur)
+		this (cdr this)
+		i    (1+ i)))
+	(nreverse tlis)
+	(setq isuf (min isuf i))))
+    (setq head (nreverse head))
+    (if (or (zerop isuf) (> isuf len))
+	;; no suffix at all
+	(cons nil lis)
+      (let* ((n      (- (length head) isuf))
+	     ;; get suffix
+	     (suffix (nthcdr n head))
+	     (tail   (and (> n 0)
+			  (progn
+			    (setcdr (nthcdr (1- n) head) nil)
+			    head)))
+	     before empty-p)
+	;; adjust first element
+	(if (or (not (eq (ebnf-node-kind (car lis)) 'ebnf-generate-sequence))
+		(null tail))
+	    (setq lis     (cdr lis)
+		  tail    lis
+		  empty-p t)
+	  (if (= (length tail) 1)
+	      (setcar lis (car tail))
+	    (ebnf-node-list (car lis) tail))
+	  (setq tail (cdr lis)))
+	;; eliminate suffix from lis based on isuf
+	(while tail
+	  (let ((elt (car tail))
+		rest)
+	    (if (and (eq (ebnf-node-kind elt) 'ebnf-generate-sequence)
+		     (setq rest (ebnf-node-list elt)
+			   n    (- (length rest) isuf))
+		     (> n 0))
+		(progn
+		  (if (= n 1)
+		      (setcar tail (car rest))
+		    (setcdr (nthcdr (1- n) rest) nil)
+		    (ebnf-node-list elt rest))
+		  (setq before tail))
+	      (setq empty-p t)
+	      (if before
+		  (setcdr before (cdr tail))
+		(setq lis (cdr lis))))
+	    (setq tail (cdr tail))))
+	(cons suffix (ebnf-unique-list
+		      (if empty-p
+			  (nconc lis (list (ebnf-make-empty)))
+			lis)))))))
+
+
+(defun ebnf-unique-list (nlist)
+  (let ((current nlist)
+	before)
+    (while current
+      (let ((tail (cdr current))
+	    (head (car current))
+	    remove-p)
+	(while tail
+	  (if (not (ebnf-node-equal head (car tail)))
+	      (setq tail (cdr tail))
+	    (setq remove-p t
+		  tail     nil)
+	    (if before
+		(setcdr before (cdr current))
+	      (setq nlist (cdr nlist)))))
+	(or remove-p
+	    (setq before current))
+	(setq current (cdr current))))
+    nlist))
+
+
+(defun ebnf-node-equal (A B)
+  (let ((kindA (ebnf-node-kind A))
+	(kindB (ebnf-node-kind B)))
+    (and (eq kindA kindB)
+	 (cond
+	  ;; empty
+	  ((eq kindA 'ebnf-generate-empty)
+	   t)
+	  ;; non-terminal, terminal, special
+	  ((memq kindA '(ebnf-generate-non-terminal
+			 ebnf-generate-terminal
+			 ebnf-generate-special))
+	   (string= (ebnf-node-name A) (ebnf-node-name B)))
+	  ;; alternative, sequence
+	  ((memq kindA '(ebnf-generate-alternative ; any order
+			 ebnf-generate-sequence)) ; order is important
+	   (let ((listA (ebnf-node-list A))
+		 (listB (ebnf-node-list B)))
+	     (and (= (length listA) (length listB))
+		  (let ((ok t))
+		    (while (and ok listA)
+		      (setq ok    (ebnf-node-equal (car listA) (car listB))
+			    listA (cdr listA)
+			    listB (cdr listB)))
+		    ok))))
+	  ;; production
+	  ((eq kindA 'ebnf-generate-production)
+	   (and (string= (ebnf-node-name A) (ebnf-node-name B))
+		(ebnf-node-equal (ebnf-node-production A)
+				 (ebnf-node-production B))))
+	  ;; otherwise
+	  (t
+	   nil)
+	  ))))
+
+
+(defun ebnf-create-alternative (alt)
+  (if (> (length alt) 1)
+      (ebnf-make-alternative alt)
+    (car alt)))
+
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+
+(provide 'ebnf-otz)
+
+
+;;; ebnf-otz.el ends here