From: akr <akr>
Date: Fri, 9 Oct 1998 12:23:11 +0000 (+0000)
Subject: * Sync up to flim-1_10_2 from flim-1_10_0.
X-Git-Tag: doodle-1_10_1~1
X-Git-Url: http://git.chise.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6769bf5954ca2bf221dfa9a41e2d47b24a135d79;p=elisp%2Fflim.git

* Sync up to flim-1_10_2 from flim-1_10_0.

* mime-def.el (mime-library-product): Bump up to FLAM-DOODLE
1.10.1.
---

diff --git a/ChangeLog b/ChangeLog
index 4dc2481..22b8735 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+1998-10-09  Tanaka Akira      <akr@jaist.ac.jp>
+
+	* Sync up to flim-1_10_2 from flim-1_10_0.
+
+	* mime-def.el (mime-library-product): Bump up to FLAM-DOODLE
+	1.10.1.
+
 1998-09-30  Tanaka Akira      <akr@jaist.ac.jp>
 
 	* Sync up with flim-1_10_0.
@@ -1189,6 +1196,105 @@
 	* eword-decode.el: Copied from AKEMI branch of SEMI.
 
 
+1998-10-08  MORIOKA Tomohiko  <morioka@jaist.ac.jp>
+
+	* FLIM: Version 1.10.2 (Kintetsu-Miyazu) was released.
+
+	* mime-def.el, mel.el, mel-b-dl.el: Move variable
+	`base64-dl-module' from mel-b-dl.el and mel.el to mime-def.el.
+
+1998-10-08  MORIOKA Tomohiko  <morioka@jaist.ac.jp>
+
+	* mel.el (mel-ccl-module): New variable; use it to check mel-ccl
+	is available.
+
+	* FLIM-ELS: Don't install mel-ccl for anything older than MULE
+	2.3.
+
+1998-10-08  MORIOKA Tomohiko  <morioka@jaist.ac.jp>
+
+	* mel-u.el: Use `mel-define-backend' to define "x-uue".
+	Define "x-uuencode" as a clone of "x-uue".
+
+	* Move variable `mel-encoding-module-alist' from mel.el to
+	mime-def.el.
+	
+	* mel.el (mel-find-function): Use function
+	`mel-find-function-from-obarray'.
+	Use `mel-define-backend' to define "7bit", "8bit" and "binary";
+	don't define methods of "8bit" and "binary"; inherit methods from
+	"7bit".
+
+	* mime-def.el (mel-service-list): New variable.
+	(mel-define-service): New implementation.
+	(mel-find-function-from-obarray): New inline function.
+	(mel-copy-method): New inline function.
+	(mel-copy-backend): New inline function.
+	(mel-define-backend): New macro.
+
+1998-10-08  MORIOKA Tomohiko  <morioka@jaist.ac.jp>
+
+	* mel-u.el: Define method functions of mel.
+	(mime-encode-region): Use `mel-define-method-function'; abolish
+	`uuencode-encode-region'.
+	(mime-decode-region): Use `mel-define-method-function'; abolish
+	`uuencode-decode-region'.
+	(mime-encode-string): New method.
+	(mime-decode-string): New method.
+	(mime-insert-encoded-file): Use `mel-define-method'; abolish
+	`uuencode-insert-encoded-file'.
+	(mime-write-decoded-region): Use `mel-define-method'; abolish
+	`uuencode-write-decoded-region'.
+
+1998-10-07  MORIOKA Tomohiko  <morioka@jaist.ac.jp>
+
+	* mime-def.el (mel-define-service): Add DOC.
+	(mel-define-method): Add DOC.
+	(mel-define-method-function): Add DOC.
+
+	* mime-en.sgml, mime-ja.sgml: Modify for FLIM 1.10.
+
+
+1998-10-07  MORIOKA Tomohiko  <morioka@jaist.ac.jp>
+
+	* FLIM: Version 1.10.1 (Miyamaki) was released.
+
+1998-10-06  MORIOKA Tomohiko  <morioka@jaist.ac.jp>
+
+	* mel-g.el: Define method functions of mel.
+	(mime-encode-region): Use `mel-define-method-function'; abolish
+	`gzip64-encode-region'.
+	(mime-decode-region): Use `mel-define-method-function'; abolish
+	`gzip64-decode-region'.
+	(mime-encode-string): New method.
+	(mime-decode-string): New method.
+	(mime-insert-encoded-file): Use `mel-define-method'; abolish
+	`gzip64-insert-encoded-file'.
+	(mime-write-decoded-region): Use `mel-define-method'; abolish
+	`gzip64-write-decoded-region'.
+
+	* mime-def.el (mime-library-product): New variable; abolish
+	`mime-library-version'.
+	(mime-product-name): New macro.
+	(mime-product-version): New macro.
+	(mime-product-code-name): New macro.
+	(mime-library-version): Renamed from
+	`mime-library-version-string'; use `mime-library-product',
+	`mime-product-name', `mime-product-version' and
+	`mime-product-code-name'.
+
+	* mime-def.el (mm-define-backend): Add DOC.
+	(mm-define-method): Add DOC.
+
+	* mel.el (mime-encoding-list): Modify DOC to add description about
+	optional argument SERVICE.
+
+1998-10-04  MORIOKA Tomohiko  <morioka@jaist.ac.jp>
+
+	* mime-ja.sgml, mime-en.sgml (mm-backend module): Write
+	description of `mm-define-backend' and `mm-define-method'.
+
+
 1998-09-29  MORIOKA Tomohiko  <morioka@jaist.ac.jp>
 
 	* FLIM: Version 1.10.0 (K-Dòdo)-A was released.
diff --git a/DOODLE-VERSION b/DOODLE-VERSION
index e8770a7..f6dac3a 100644
--- a/DOODLE-VERSION
+++ b/DOODLE-VERSION
@@ -20,7 +20,7 @@ Order is not significant.
   14 $B3A(B		$B$+$-(B			10R6.5/10.0	FLAM-DOODLE 1.9.4
   15 $B?<;Y;R(B	$B$3$-$/$A$J$7(B		10YR7.5/8.0	FLAM-DOODLE 1.9.5
   16 $B4;;R(B	$B$3$&$8(B			7.5YR7.0/11.0	FLAM-DOODLE 1.10.0
-  17 $B5`MU(B	$B$/$A$P(B			10YR7.5/10.0
+  17 $B5`MU(B	$B$/$A$P(B			10YR7.5/10.0	FLAM-DOODLE 1.10.1
   18 $B@VGrFK(B	$B$"$+$7$m$D$k$P$_(B	5.0YR8.0/6.0
   19 $B>.F&(B	$B$"$:$-(B			2.5R3.5/5.0
   20 $BIrF:Cc(B	$B$($S$A$c(B		5.0R4.0/11.0
diff --git a/FLIM-ELS b/FLIM-ELS
index 7c80cd5..bb5e91c 100644
--- a/FLIM-ELS
+++ b/FLIM-ELS
@@ -35,7 +35,8 @@
     (setq flim-modules (cons 'mel-b-dl flim-modules))
   )
 
-(if (featurep 'mule)
+(if (and (featurep 'mule)
+	 (not (and (boundp 'MULE) MULE)))
     (setq flim-modules (cons 'mel-ccl flim-modules))
   )
 
diff --git a/FLIM-VERSION b/FLIM-VERSION
index f865c35..11c4653 100644
--- a/FLIM-VERSION
+++ b/FLIM-VERSION
@@ -23,10 +23,10 @@
 1.9.1	Tonosh-Dò-A			$(BIYLnAq(B
 1.9.2	Shin-Tanabe		$(B?7EDJU(B
 1.10.0	K-Dòdo-A			$(B6=8M(B
------	Miyamaki		$(B;0;3LZ(B
------	Kintetsu-Miyazu		$(B6aE45\DE(B
+1.10.1	Miyamaki		$(B;0;3LZ(B
+1.10.2	Kintetsu-Miyazu		$(B6aE45\DE(B
 -----	Komada			$(B9}ED(B
------	Shin-H-Dòsono-A		$(B?7=K1`(B
+-----	Shin-H-Dòsono-A		$(B?7=K1`(B		; <=> JR $(BJRD.@~(B $(B=K1`(B
 -----	Kizugawadai		$(BLZDE@nBf(B
 -----	Yamadagawa		$(B;3ED@n(B
 -----	Takanohara		$(B9b$N86(B
diff --git a/Makefile b/Makefile
index 9c7d9b3..e06536a 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,7 @@
 #
 
 PACKAGE = flim
-VERSION = 1.10.0
+VERSION = 1.10.2
 
 TAR	= tar
 RM	= /bin/rm -f
diff --git a/mel-b-dl.el b/mel-b-dl.el
index 1d3fb14..0f0f22e 100644
--- a/mel-b-dl.el
+++ b/mel-b-dl.el
@@ -28,9 +28,6 @@
 (require 'mime-def)
 
 (eval-and-compile
-  (defvar base64-dl-module
-    (expand-file-name "base64.so" exec-directory))
-
   (defvar base64-dl-handle
     (and (file-exists-p base64-dl-module)
 	 (dynamic-link base64-dl-module)))
diff --git a/mel-g.el b/mel-g.el
index 73db30f..bc2c510 100644
--- a/mel-g.el
+++ b/mel-g.el
@@ -82,21 +82,40 @@
 		       )
     ))
 
-(defalias 'gzip64-encode-region 'gzip64-external-encode-region)
-(defalias 'gzip64-decode-region 'gzip64-external-decode-region)
+(mel-define-method-function (mime-encode-region start end (nil "x-gzip64"))
+			    'gzip64-external-encode-region)
+(mel-define-method-function (mime-decode-region start end (nil "x-gzip64"))
+			    'gzip64-external-decode-region)
+
+
+;;; @ encoder/decoder for string
+;;;
+
+(mel-define-method mime-encode-string (string (nil "x-gzip64"))
+  (with-temp-buffer
+    (insert string)
+    (gzip64-external-encode-region (point-min)(point-max))
+    (buffer-string)))
+
+(mel-define-method mime-decode-string (string (nil "x-gzip64"))
+  (with-temp-buffer
+    (insert string)
+    (gzip64-external-decode-region (point-min)(point-max))
+    (buffer-string)))
 
 
 ;;; @ encoder/decoder for file
 ;;;
 
-(defun gzip64-insert-encoded-file (filename)
+(mel-define-method mime-insert-encoded-file (filename (nil "x-gzip64"))
   (interactive (list (read-file-name "Insert encoded file: ")))
   (apply (function call-process) (car gzip64-external-encoder)
 	 filename t nil
 	 (cdr gzip64-external-encoder))
   )
 
-(defun gzip64-write-decoded-region (start end filename)
+(mel-define-method mime-write-decoded-region (start end filename
+						    (nil "x-gzip64"))
   "Decode and write current region encoded by gzip64 into FILENAME.
 START and END are buffer positions."
   (interactive
diff --git a/mel-u.el b/mel-u.el
index d004d60..5a756aa 100644
--- a/mel-u.el
+++ b/mel-u.el
@@ -6,7 +6,7 @@
 ;; Created: 1995/10/25
 ;; Keywords: uuencode
 
-;; This file is part of MEL (MIME Encoding Library).
+;; This file is part of FLIM (Faithful Library about Internet Message).
 
 ;; This program is free software; you can redistribute it and/or
 ;; modify it under the terms of the GNU General Public License as
@@ -29,6 +29,9 @@
 (require 'mime-def)
 
 
+(mel-define-backend "x-uue")
+
+
 ;;; @ variables
 ;;;
 
@@ -93,14 +96,32 @@ variable `uuencode-external-decoder'."
 	   ))
       )))
 
-(defalias 'uuencode-encode-region 'uuencode-external-encode-region)
-(defalias 'uuencode-decode-region 'uuencode-external-decode-region)
+(mel-define-method-function (mime-encode-region start end (nil "x-uue"))
+			    'uuencode-external-encode-region)
+(mel-define-method-function (mime-decode-region start end (nil "x-uue"))
+			    'uuencode-external-decode-region)
+
+
+;;; @ encoder/decoder for string
+;;;
+
+(mel-define-method mime-encode-string (string (nil "x-uue"))
+  (with-temp-buffer
+    (insert string)
+    (uuencode-external-encode-region (point-min)(point-max))
+    (buffer-string)))
+
+(mel-define-method mime-decode-string (string (nil "x-uue"))
+  (with-temp-buffer
+    (insert string)
+    (uuencode-external-decode-region (point-min)(point-max))
+    (buffer-string)))
 
 
 ;;; @ uuencode encoder/decoder for file
 ;;;
 
-(defun uuencode-insert-encoded-file (filename)
+(mel-define-method mime-insert-encoded-file (filename (nil "x-uue"))
   "Insert file encoded by unofficial uuencode format.
 This function uses external uuencode encoder which is specified by
 variable `uuencode-external-encoder'."
@@ -109,7 +130,8 @@ variable `uuencode-external-encoder'."
 		(file-name-nondirectory filename))
   )
 
-(defun uuencode-write-decoded-region (start end filename)
+(mel-define-method mime-write-decoded-region (start end filename
+						    (nil "x-gzip64"))
   "Decode and write current region encoded by uuencode into FILENAME.
 START and END are buffer positions."
   (interactive
@@ -140,4 +162,6 @@ START and END are buffer positions."
 
 (provide 'mel-u)
 
+(mel-define-backend "x-uuencode" ("x-uue"))
+
 ;;; mel-u.el ends here
diff --git a/mel.el b/mel.el
index 16bc0e0..9495b46 100644
--- a/mel.el
+++ b/mel.el
@@ -34,10 +34,10 @@
   :group 'mime
   :type '(repeat string))
 
-(defvar mel-encoding-module-alist nil)
-
 (defun mime-encoding-list (&optional service)
-  "Return list of Content-Transfer-Encoding."
+  "Return list of Content-Transfer-Encoding.
+If SERVICE is specified, it returns available list of
+Content-Transfer-Encoding for it."
   (if service
       (let (dest)
 	(mapatoms (lambda (sym)
@@ -72,36 +72,23 @@
       )))
 
 (defsubst mel-find-function (service encoding)
-  (let* ((oba (symbol-value (intern (format "%s-obarray" service))))
-	 (f (intern-soft encoding oba)))
-    (or f
-	(let ((rest (cdr (assoc encoding mel-encoding-module-alist))))
-	  (while (and rest
-		      (progn
-			(require (car rest))
-			(null (setq f (intern-soft encoding oba)))
-			))
-	    (setq rest (cdr rest))
-	    )
-	  f))))
+  (mel-find-function-from-obarray
+   (symbol-value (intern (format "%s-obarray" service))) encoding))
 
 
 ;;; @ setting for modules
 ;;;
 
-(defvar base64-dl-module
-  (and (fboundp 'dynamic-link)
-       (let ((path (expand-file-name "base64.so" exec-directory)))
-	 (and (file-exists-p path)
-	      path))))
-
+(defvar mel-ccl-module
+  (and (featurep 'mule)
+       (module-installed-p 'mel-ccl)))
 
 (mel-use-module 'mel-b '("base64" "B"))
 (mel-use-module 'mel-q '("quoted-printable" "Q"))
 (mel-use-module 'mel-g '("x-gzip64"))
 (mel-use-module 'mel-u '("x-uue" "x-uuencode"))
 
-(if (featurep 'mule)
+(if mel-ccl-module
     (mel-use-module 'mel-ccl '("base64" "quoted-printable" "B" "Q"))
   )
 
@@ -109,6 +96,7 @@
     (mel-use-module 'mel-b-dl '("base64" "B"))
   )
 
+(mel-define-backend "7bit")
 (mel-define-method-function (mime-encode-string string (nil "7bit"))
 			    'identity)
 (mel-define-method-function (mime-decode-string string (nil "7bit"))
@@ -121,29 +109,9 @@
 			     start end filename (nil "7bit"))
 			    'write-region-as-binary)
 
-(mel-define-method-function (mime-encode-string string (nil "8bit"))
-			    'identity)
-(mel-define-method-function (mime-decode-string string (nil "8bit"))
-			    'identity)
-(mel-define-method mime-encode-region (start end (nil "8bit")))
-(mel-define-method mime-decode-region (start end (nil "8bit")))
-(mel-define-method-function (mime-insert-encoded-file filename (nil "8bit"))
-			    'insert-file-contents-as-binary)
-(mel-define-method-function (mime-write-decoded-region
-			     start end filename (nil "8bit"))
-			    'write-region-as-binary)
+(mel-define-backend "8bit" ("7bit"))
 
-(mel-define-method-function (mime-encode-string string (nil "binary"))
-			    'identity)
-(mel-define-method-function (mime-decode-string string (nil "binary"))
-			    'identity)
-(mel-define-method mime-encode-region (start end (nil "binary")))
-(mel-define-method mime-decode-region (start end (nil "binary")))
-(mel-define-method-function (mime-insert-encoded-file filename (nil "binary"))
-			    'insert-file-contents-as-binary)
-(mel-define-method-function (mime-write-decoded-region
-			     start end filename (nil "binary"))
-			    'write-region-as-binary)
+(mel-define-backend "binary" ("8bit"))
 
 
 ;;; @ region
diff --git a/mime-def.el b/mime-def.el
index c870f25..4a69a34 100644
--- a/mime-def.el
+++ b/mime-def.el
@@ -24,15 +24,24 @@
 
 ;;; Code:
 
-(defconst mime-library-version
-  '("FLAM-DOODLE" "$B4;;R(B 7.5YR7.0/11.0" 1 10 0)
-  "Implementation name, version name and numbers of MIME-library package.")
+(defconst mime-library-product ["FLAM-DOODLE" (1 10 1) "µàÍÕ 10YR7.5/10.0"]
+  "Product name, version number and code name of MIME-library package.")
+
+(defmacro mime-product-name (product)
+  `(aref ,product 0))
+
+(defmacro mime-product-version (product)
+  `(aref ,product 1))
 
-(defconst mime-library-version-string
-  `,(concat (car mime-library-version) " "
+(defmacro mime-product-code-name (product)
+  `(aref ,product 2))
+
+(defconst mime-library-version
+  (eval-when-compile
+    (concat (mime-product-name mime-library-product) " "
 	    (mapconcat #'number-to-string
-		       (cddr mime-library-version) ".")
-	    " - \"" (cadr mime-library-version) "\""))
+		       (mime-product-version mime-library-product) ".")
+	    " - \"" (mime-product-code-name mime-library-product) "\"")))
 
 
 ;;; @ variables
@@ -309,6 +318,9 @@ message/rfc822, `mime-entity' structures of them are included in
 (defvar mime-entity-implementation-alist nil)
 
 (defmacro mm-define-backend (type &optional parents)
+  "Define TYPE as a mm-backend.
+If PARENTS is specified, TYPE inherits PARENTS.
+Each parent must be backend name (symbol)."
   (if parents
       `(let ((rest ',(reverse parents)))
 	 (while rest
@@ -321,6 +333,11 @@ message/rfc822, `mime-entity' structures of them are included in
 	   ))))
 
 (defmacro mm-define-method (name args &rest body)
+  "Define NAME as a method function of (nth 1 (car ARGS)) backend.
+
+ARGS is like an argument list of lambda, but (car ARGS) must be
+specialized parameter.  (car (car ARGS)) is name of variable and (nth
+1 (car ARGS)) is name of backend."
   (let* ((specializer (car args))
 	 (class (nth 1 specializer))
 	 (self (car specializer)))
@@ -355,21 +372,72 @@ message/rfc822, `mime-entity' structures of them are included in
 ;;; @ for mel-backend
 ;;;
 
+(defvar mel-service-list nil)
+
 (defmacro mel-define-service (name &optional args &rest rest)
-  (if args
-      `(progn
-	 (defvar ,(intern (format "%s-obarray" name)) (make-vector 1 nil))
-	 (defun ,name ,args
-	   ,@rest
-	   (funcall (mel-find-function ',name ,(car (last args)))
-		    ,@(mm-arglist-to-arguments (butlast args)))
-	   ))
-    `(defvar ,(intern (format "%s-obarray" name)) (make-vector 1 nil))
-    ))
+  "Define NAME as a service for Content-Transfer-Encodings.
+If ARGS is specified, NAME is defined as a generic function for the
+service."
+  `(progn
+     (add-to-list 'mel-service-list ',name)
+     (defvar ,(intern (format "%s-obarray" name)) (make-vector 1 nil))
+     ,@(if args
+	   `((defun ,name ,args
+	       ,@rest
+	       (funcall (mel-find-function ',name ,(car (last args)))
+			,@(mm-arglist-to-arguments (butlast args)))
+	       )))
+     ))
 
 (put 'mel-define-service 'lisp-indent-function 'defun)
 
+
+(defvar mel-encoding-module-alist nil)
+
+(defsubst mel-find-function-from-obarray (ob-array encoding)
+  (let* ((f (intern-soft encoding ob-array)))
+    (or f
+	(let ((rest (cdr (assoc encoding mel-encoding-module-alist))))
+	  (while (and rest
+		      (progn
+			(require (car rest))
+			(null (setq f (intern-soft encoding ob-array)))
+			))
+	    (setq rest (cdr rest))
+	    )
+	  f))))
+
+(defsubst mel-copy-method (service src-backend dst-backend)
+  (let* ((oa (symbol-value (intern (format "%s-obarray" service))))
+	 (f (mel-find-function-from-obarray oa src-backend))
+	 sym)
+    (when f
+      (setq sym (intern dst-backend oa))
+      (or (fboundp sym)
+	  (fset sym (symbol-function f))
+	  ))))
+       
+(defsubst mel-copy-backend (src-backend dst-backend)
+  (let ((services mel-service-list))
+    (while services
+      (mel-copy-method (car services) src-backend dst-backend)
+      (setq services (cdr services)))))
+
+(defmacro mel-define-backend (type &optional parents)
+  "Define TYPE as a mel-backend.
+If PARENTS is specified, TYPE inherits PARENTS.
+Each parent must be backend name (string)."
+  (cons 'progn
+	(mapcar (lambda (parent)
+		  `(mel-copy-backend ,parent ,type)
+		  )
+		parents)))
+
 (defmacro mel-define-method (name args &rest body)
+  "Define NAME as a method function of (nth 1 (car (last ARGS))) backend.
+ARGS is like an argument list of lambda, but (car (last ARGS)) must be
+specialized parameter.  (car (car (last ARGS))) is name of variable
+and (nth 1 (car (last ARGS))) is name of backend (encoding)."
   (let* ((specializer (car (last args)))
 	 (class (nth 1 specializer)))
     `(progn
@@ -381,6 +449,11 @@ message/rfc822, `mime-entity' structures of them are included in
 (put 'mel-define-method 'lisp-indent-function 'defun)
 
 (defmacro mel-define-method-function (spec function)
+  "Set SPEC's function definition to FUNCTION.
+First element of SPEC is service.
+Rest of ARGS is like an argument list of lambda, but (car (last ARGS))
+must be specialized parameter.  (car (car (last ARGS))) is name of
+variable and (nth 1 (car (last ARGS))) is name of backend (encoding)."
   (let* ((name (car spec))
 	 (args (cdr spec))
 	 (specializer (car (last args)))
@@ -401,6 +474,12 @@ message/rfc822, `mime-entity' structures of them are included in
 	 (intern ,class ,(intern (format "%s-obarray" name))))
        )))
 
+(defvar base64-dl-module
+  (and (fboundp 'dynamic-link)
+       (let ((path (expand-file-name "base64.so" exec-directory)))
+	 (and (file-exists-p path)
+	      path))))
+
 
 ;;; @ end
 ;;;
diff --git a/mime-en.sgml b/mime-en.sgml
index ed4b19f..1aeb63c 100644
--- a/mime-en.sgml
+++ b/mime-en.sgml
@@ -1,6 +1,6 @@
 <!doctype sinfo system>
 <head>
-<title>FLIM 1.9 Manual about MIME Features
+<title>FLIM 1.10 Manual about MIME Features
 <author>MORIOKA Tomohiko <mail>morioka@jaist.ac.jp</mail>
 <date>1998/07/01
 
@@ -393,12 +393,42 @@ return the result.
 </defun>
 
 
-<h3> How to make mm-backend
+<h3> Definition of mm-backend
 <node> mm-backend module
 <p>
-(It is not written yet, sorry. (^_^;)
+<defmacro name="mm-define-backend">
+<args> type
+<opts> parents
 <p>
-(Please read mm*.el)
+Define <var>type</var> as a mm-backend.
+<p>
+If <var>PARENTS</var> is specified, <var>type</var> inherits parents.
+Each parent must be representation-type.
+<p>
+Example:
+<p>
+<lisp>
+(mm-define-backend chao (generic))
+</lisp>
+</defmacro>
+
+<defmacro name="mm-define-method">
+<args> name args <rest> body
+<p>
+Define <var>name</var> as a method function of (nth 1 (car
+<var>args</var>)) backend.
+<p>
+<var>args</var> is like an argument list of lambda, but (car
+<var>args</var>) must be specialized parameter.  (car (car
+<var>args</var>)) is name of variable and (nth 1 (car
+<var>args</var>)) is name of backend (representation-type).
+<p>
+Example:
+<p>
+<lisp>
+(mm-define-method entity-cooked-p ((entity chao)) nil)
+</lisp>
+</defmacro>
 
 
 <h1> Information of Content-Type field
@@ -636,8 +666,8 @@ Content-Transfer-Encoding $BMs$,B8:_$7$J$$>l9g$O(B
 </defun>
 
 
-<h2> Region encoding/decoding
-<node> Region encoder/decoder
+<h2> Encoder/decoder
+<node> encoder/decoder
 <p>
 <defun name="mime-encode-region">
 	    <args> start end encoding
@@ -653,49 +683,14 @@ Decode region <var>start</var> to <var>end</var> of current buffer
 using <var>encoding</var>.
 </defun>
 
-<defvar name="mime-encoding-method-alist">
-<p>
-Alist of encoding vs. corresponding method to encode region.
-<p>
-Each element looks like <code>(STRING . FUNCTION)</code> or
-<code>(STRING . nil)</code>.  <var>string</var> is
-content-transfer-encoding.  <code>function</code> is region encoder
-and <code>nil</code> means not to encode.
-</defvar>
 
-<defvar name="mime-decoding-method-alist">
-<p>
-Alist of encoding vs. corresponding method to decode region.
-<p>
-Each element looks like <code>(STRING . FUNCTION)</code> or
-<code>(STRING . nil)</code>.  <var>string</var> is
-content-transfer-encoding.  <code>function</code> is region decoder
-and <code>nil</code> means not to decode.
-</defvar>
-
-
-<h2> String encoding/decoding
-<node> String encoder/decoder
-<p>
 <defun name="mime-decode-string">
 	      <args> string encoding
 <p>
 <var>string</var> $B$r(B <var>encoding</var> $B$H$7$FI|9f$7$?7k2L$rJV$7$^$9!#(B
 </defun>
 
-<defvar name="mime-string-decoding-method-alist">
-<p>
-Alist of encoding vs. corresponding method to decode string.
-<p>
-Each element looks like <code>(STRING . FUNCTION)</code>.
-STRING is content-transfer-encoding.
-FUNCTION is string decoder.
-</defvar>
-
 
-<h2> File encoding/decoding
-<node> File encoder/decoder
-<p>
 <defun name="mime-insert-encoded-file">
 	    <args> filename encoding
 <p>
@@ -711,24 +706,102 @@ Decode and write current region encoded by <var>encoding</var> into
 <var>start</var> and <var>end</var> are buffer positions.
 </defun>
 
-<defvar name="mime-file-encoding-method-alist">
+
+<h2> Other utilities
+<node> Encoding information
 <p>
-Alist of encoding vs. corresponding method to insert encoded file.
+<defun name="mime-encoding-list">
+	    <opts> SERVICE
 <p>
-Each element looks like <code>(STRING . FUNCTION)</code>.  STRING is
-content-transfer-encoding.  FUNCTION is function to insert encoded
-file.
-</defvar>
+Return list of Content-Transfer-Encoding.
+<p>
+If <var>service</var> is specified, it returns available list of
+Content-Transfer-Encoding for it.
+</defun>
 
-<defvar name="mime-file-decoding-method-alist">
+<defun name="mime-encoding-alist">
+	    <opts> SERVICE
 <p>
-Alist of encoding vs. corresponding method to write decoded region to
-file.
+Return table of Content-Transfer-Encoding for completion.
 <p>
-Each element looks like <code>(STRING . FUNCTION)</code>.  STRING is
-content-transfer-encoding.  FUNCTION is function to write decoded
-region to file.
-</defvar>
+If <var>service</var> is specified, it returns available list of
+Content-Transfer-Encoding for it.
+</defun>
+
+
+<h2> How to write encoder/decoder module
+<node> mel-backend
+<p>
+<defmacro name="mel-define-method">
+<args> name args <rest> body
+<p>
+Define <var>name</var> as a method function of (nth 1 (car (last
+<var>args</var>))) backend.
+<p>
+<var>args</var> is like an argument list of lambda, but (car (last
+<var>args</var>)) must be specialized parameter.  (car (car (last
+<var>args</var>))) is name of variable and (nth 1 (car (last
+<var>args</var>))) is name of backend (encoding).
+<p>
+Example:
+<p>
+<lisp>
+(mel-define-method mime-write-decoded-region (start end filename
+						    (nil "base64"))
+  "Decode and write current region encoded by base64 into FILENAME.
+START and END are buffer positions."
+  (interactive
+   (list (region-beginning) (region-end)
+	 (read-file-name "Write decoded region to file: ")))
+  (let ((str (buffer-substring start end)))
+    (with-temp-buffer
+      (insert (decode-base64-string str))
+      (write-region-as-binary (point-min) (point-max) filename)
+      )))
+</lisp>
+</defmacro>
+
+<defmacro name="mel-define-method-function">
+<args> spec function
+<p>
+Set <var>spec</var>'s function definition to <var>function</var>.
+<p>
+First element of <var>spec</var> is service.
+<p>
+Rest of <var>args</var> is like an argument list of lambda, but (car
+(last <var>args</var>)) must be specialized parameter.  (car (car
+(last <var>args</var>))) is name of variable and (nth 1 (car (last
+<var>args</var>))) is name of backend (encoding).
+<p>
+Example:
+<p>
+<lisp>
+(mel-define-method-function (mime-encode-string string (nil "base64"))
+			    'encode-base64-string)
+</lisp>
+</defmacro>
+
+
+<h2> How to add encoding/decoding service
+<node> generic function for mel-backend
+<p>
+<defmacro name="mel-define-service">
+<args> name
+<opts> args doc-string
+<p>
+Define <var>name</var> as a service for Content-Transfer-Encodings.
+<p>
+If <var>args</var> is specified, <var>name</var> is defined as a
+generic function for the service.
+<p>
+Example:
+<p>
+<lisp>
+(mel-define-service encoded-text-encode-string (string encoding)
+  "Encode STRING as encoded-text using ENCODING.
+ENCODING must be string.")
+</lisp>
+</defmacro>
 
 
 <h1> Network representation of header
diff --git a/mime-en.texi b/mime-en.texi
index f3bbf8a..1f28037 100644
--- a/mime-en.texi
+++ b/mime-en.texi
@@ -1,13 +1,13 @@
 \input texinfo.tex
 @setfilename mime-en.info
-@settitle{FLIM 1.9 Manual about MIME Features}
+@settitle{FLIM 1.10 Manual about MIME Features}
 @titlepage
-@title FLIM 1.9 Manual about MIME Features
+@title FLIM 1.10 Manual about MIME Features
 @author MORIOKA Tomohiko <morioka@@jaist.ac.jp>
 @subtitle 1998/07/01
 @end titlepage
 @node Top, Introduction, (dir), (dir)
-@top FLIM 1.9 Manual about MIME Features
+@top FLIM 1.10 Manual about MIME Features
 
 @ifinfo
 
@@ -414,7 +414,7 @@ when its entity is created at first.
 
 @menu
 * Request for entity::          Message-passing for entity
-* mm-backend module::           How to make mm-backend
+* mm-backend module::           Definition of mm-backend
 @end menu
 
 @node Request for entity, mm-backend module, mm-backend, mm-backend
@@ -431,11 +431,40 @@ result.@refill
 
 
 @node mm-backend module,  , Request for entity, mm-backend
-@subsection How to make mm-backend
+@subsection Definition of mm-backend
 
-(It is not written yet, sorry. (^_^;)@refill
+@defmac mm-define-backend type &optional  parents
+
+Define @var{type} as a mm-backend.@refill
+
+If @var{PARENTS} is specified, @var{type} inherits parents.  Each parent
+must be representation-type.@refill
+
+Example:@refill
+
+@lisp
+(mm-define-backend chao (generic))
+@end lisp
+@end defmac
+
+
+@defmac mm-define-method name args  &rest  body
+
+Define @var{name} as a method function of (nth 1 (car @var{args}))
+backend.@refill
+
+@var{args} is like an argument list of lambda, but (car @var{args}) must
+be specialized parameter.  (car (car @var{args})) is name of variable
+and (nth 1 (car @var{args})) is name of backend
+(representation-type).@refill
+
+Example:@refill
+
+@lisp
+(mm-define-method entity-cooked-p ((entity chao)) nil)
+@end lisp
+@end defmac
 
-(Please read mm*.el)
 
 
 @node Content-Type, Content-Disposition, Entity, Top
@@ -694,12 +723,13 @@ Content-Transfer-Encoding.
 
 @menu
 * Content-Transfer-Encoding parser::  Parser
-* Region encoder/decoder::      Region encoding/decoding
-* String encoder/decoder::      String encoding/decoding
-* File encoder/decoder::        File encoding/decoding
+* encoder/decoder::             Encoder/decoder
+* Encoding information::        Other utilities
+* mel-backend::                 How to write encoder/decoder module
+* generic function for mel-backend::  How to add encoding/decoding service
 @end menu
 
-@node Content-Transfer-Encoding parser, Region encoder/decoder, Content-Transfer-Encoding, Content-Transfer-Encoding
+@node Content-Transfer-Encoding parser, encoder/decoder, Content-Transfer-Encoding, Content-Transfer-Encoding
 @section Parser
 
 @defun mime-parse-Content-Transfer-Encoding string
@@ -719,8 +749,8 @@ Content-Transfer-Encoding $BMs$,B8:_$7$J$$>l9g$O(B@var{default-encoding} $B$r
 
 
 
-@node Region encoder/decoder, String encoder/decoder, Content-Transfer-Encoding parser, Content-Transfer-Encoding
-@section Region encoding/decoding
+@node encoder/decoder, Encoding information, Content-Transfer-Encoding parser, Content-Transfer-Encoding
+@section Encoder/decoder
 
 @defun mime-encode-region start end encoding
 
@@ -736,83 +766,123 @@ Decode region @var{start} to @var{end} of current buffer using
 @end defun
 
 
-@defvar mime-encoding-method-alist
-
-Alist of encoding vs. corresponding method to encode region.@refill
 
-Each element looks like @code{(STRING . FUNCTION)} or @code{(STRING
-. nil)}.  @var{string} is content-transfer-encoding.  @code{function} is
-region encoder and @code{nil} means not to encode.
-@end defvar
+@defun mime-decode-string string encoding
 
+@var{string} $B$r(B @var{encoding} $B$H$7$FI|9f$7$?7k2L$rJV$7$^$9!#(B
+@end defun
 
-@defvar mime-decoding-method-alist
 
-Alist of encoding vs. corresponding method to decode region.@refill
 
-Each element looks like @code{(STRING . FUNCTION)} or @code{(STRING
-. nil)}.  @var{string} is content-transfer-encoding.  @code{function} is
-region decoder and @code{nil} means not to decode.
-@end defvar
+@defun mime-insert-encoded-file filename encoding
 
+Insert file @var{FILENAME} encoded by @var{ENCODING} format.
+@end defun
 
 
-@node String encoder/decoder, File encoder/decoder, Region encoder/decoder, Content-Transfer-Encoding
-@section String encoding/decoding
+@defun mime-write-decoded-region start end filename encoding
 
-@defun mime-decode-string string encoding
+Decode and write current region encoded by @var{encoding} into
+@var{filename}.@refill
 
-@var{string} $B$r(B @var{encoding} $B$H$7$FI|9f$7$?7k2L$rJV$7$^$9!#(B
+@var{start} and @var{end} are buffer positions.
 @end defun
 
 
-@defvar mime-string-decoding-method-alist
 
-Alist of encoding vs. corresponding method to decode string.@refill
+@node Encoding information, mel-backend, encoder/decoder, Content-Transfer-Encoding
+@section Other utilities
 
-Each element looks like @code{(STRING . FUNCTION)}.  STRING is
-content-transfer-encoding.  FUNCTION is string decoder.
-@end defvar
+@defun mime-encoding-list &optional  SERVICE
 
+Return list of Content-Transfer-Encoding.@refill
 
+If @var{service} is specified, it returns available list of
+Content-Transfer-Encoding for it.
+@end defun
 
-@node File encoder/decoder,  , String encoder/decoder, Content-Transfer-Encoding
-@section File encoding/decoding
 
-@defun mime-insert-encoded-file filename encoding
+@defun mime-encoding-alist &optional  SERVICE
 
-Insert file @var{FILENAME} encoded by @var{ENCODING} format.
+Return table of Content-Transfer-Encoding for completion.@refill
+
+If @var{service} is specified, it returns available list of
+Content-Transfer-Encoding for it.
 @end defun
 
 
-@defun mime-write-decoded-region start end filename encoding
 
-Decode and write current region encoded by @var{encoding} into
-@var{filename}.@refill
+@node mel-backend, generic function for mel-backend, Encoding information, Content-Transfer-Encoding
+@section How to write encoder/decoder module
 
-@var{start} and @var{end} are buffer positions.
-@end defun
+@defmac mel-define-method name args  &rest  body
 
+Define @var{name} as a method function of (nth 1 (car (last
+@var{args}))) backend.@refill
 
-@defvar mime-file-encoding-method-alist
+@var{args} is like an argument list of lambda, but (car (last
+@var{args})) must be specialized parameter.  (car (car (last
+@var{args}))) is name of variable and (nth 1 (car (last @var{args}))) is
+name of backend (encoding).@refill
 
-Alist of encoding vs. corresponding method to insert encoded
-file.@refill
+Example:@refill
 
-Each element looks like @code{(STRING . FUNCTION)}.  STRING is
-content-transfer-encoding.  FUNCTION is function to insert encoded file.
-@end defvar
+@lisp
+(mel-define-method mime-write-decoded-region (start end filename
+						    (nil "base64"))
+  "Decode and write current region encoded by base64 into FILENAME.
+START and END are buffer positions."
+  (interactive
+   (list (region-beginning) (region-end)
+	 (read-file-name "Write decoded region to file: ")))
+  (let ((str (buffer-substring start end)))
+    (with-temp-buffer
+      (insert (decode-base64-string str))
+      (write-region-as-binary (point-min) (point-max) filename)
+      )))
+@end lisp
+@end defmac
 
 
-@defvar mime-file-decoding-method-alist
+@defmac mel-define-method-function spec function
 
-Alist of encoding vs. corresponding method to write decoded region to
-file.@refill
+Set @var{spec}'s function definition to @var{function}.@refill
 
-Each element looks like @code{(STRING . FUNCTION)}.  STRING is
-content-transfer-encoding.  FUNCTION is function to write decoded region
-to file.
-@end defvar
+First element of @var{spec} is service.@refill
+
+Rest of @var{args} is like an argument list of lambda, but (car (last
+@var{args})) must be specialized parameter.  (car (car (last
+@var{args}))) is name of variable and (nth 1 (car (last @var{args}))) is
+name of backend (encoding).@refill
+
+Example:@refill
+
+@lisp
+(mel-define-method-function (mime-encode-string string (nil "base64"))
+			    'encode-base64-string)
+@end lisp
+@end defmac
+
+
+
+@node generic function for mel-backend,  , mel-backend, Content-Transfer-Encoding
+@section How to add encoding/decoding service
+
+@defmac mel-define-service name &optional  args doc-string
+
+Define @var{name} as a service for Content-Transfer-Encodings.@refill
+
+If @var{args} is specified, @var{name} is defined as a generic function
+for the service.@refill
+
+Example:@refill
+
+@lisp
+(mel-define-service encoded-text-encode-string (string encoding)
+  "Encode STRING as encoded-text using ENCODING.
+ENCODING must be string.")
+@end lisp
+@end defmac
 
 
 
diff --git a/mime-ja.sgml b/mime-ja.sgml
index 8240d6b..50d67d3 100644
--- a/mime-ja.sgml
+++ b/mime-ja.sgml
@@ -1,6 +1,6 @@
 <!doctype sinfo system>
 <head>
-<title>FLIM 1.9 MIME $B5!G=@bL@=q(B
+<title>FLIM 1.10 MIME $B5!G=@bL@=q(B
 <author>$B<i2,(B $BCNI'(B <mail>morioka@jaist.ac.jp</mail>
 <date>1998/07/01
 
@@ -396,9 +396,39 @@ representation-type $B$NL>A0$N@hF,$K(B <code>mm</code> $B$rIU$1$?$b$N$K$J$C$F
 <h3> mm-backend $B$N:n$jJ}(B
 <node> mm-backend module
 <p>
-$B!J$9$_$^$;$s!#$=$N$&$A=q$-$^$9(B (^_^;$B!K(B
+<defmacro name="mm-define-backend">
+<args> type
+<opts> parents
 <p>
-$B!J$H$j$"$($:!"(Bmm*.el $B$r;29M$K$7$F$/$@$5$$!K(B
+Define <var>type</var> as a mm-backend.
+<p>
+If <var>PARENTS</var> is specified, <var>type</var> inherits parents.
+Each parent must be representation-type.
+<p>
+Example:
+<p>
+<lisp>
+(mm-define-backend chao (generic))
+</lisp>
+</defmacro>
+
+<defmacro name="mm-define-method">
+<args> name args <rest> body
+<p>
+Define <var>name</var> as a method function of (nth 1 (car
+<var>args</var>)) backend.
+<p>
+<var>args</var> is like an argument list of lambda, but (car
+<var>args</var>) must be specialized parameter.  (car (car
+<var>args</var>)) is name of variable and (nth 1 (car
+<var>args</var>)) is name of backend (representation-type).
+<p>
+Example:
+<p>
+<lisp>
+(mm-define-method entity-cooked-p ((entity chao)) nil)
+</lisp>
+</defmacro>
 
 
 <h1> Content-Type $BMs$N>pJs(B
@@ -632,8 +662,8 @@ Content-Transfer-Encoding $BMs$,B8:_$7$J$$>l9g$O(B
 </defun>
 
 
-<h2> $BNN0h$NId9f2=!&I|9f2=(B
-<node> Region encoder/decoder
+<h2> $BId9f2=!&I|9f2=(B
+<node> encoder/decoder
 <p>
 <defun name="mime-encode-region">
 	    <args> start end encoding
@@ -649,49 +679,14 @@ Decode region <var>start</var> to <var>end</var> of current buffer
 using <var>encoding</var>.
 </defun>
 
-<defvar name="mime-encoding-method-alist">
-<p>
-Alist of encoding vs. corresponding method to encode region.
-<p>
-Each element looks like <code>(STRING . FUNCTION)</code> or
-<code>(STRING . nil)</code>.  <var>string</var> is
-content-transfer-encoding.  <code>function</code> is region encoder
-and <code>nil</code> means not to encode.
-</defvar>
 
-<defvar name="mime-decoding-method-alist">
-<p>
-Alist of encoding vs. corresponding method to decode region.
-<p>
-Each element looks like <code>(STRING . FUNCTION)</code> or
-<code>(STRING . nil)</code>.  <var>string</var> is
-content-transfer-encoding.  <code>function</code> is region decoder
-and <code>nil</code> means not to decode.
-</defvar>
-
-
-<h2> $BJ8;zNs$NId9f2=!&I|9f2=(B
-<node> String encoder/decoder
-<p>
 <defun name="mime-decode-string">
 	      <args> string encoding
 <p>
 <var>string</var> $B$r(B <var>encoding</var> $B$H$7$FI|9f$7$?7k2L$rJV$7$^$9!#(B
 </defun>
 
-<defvar name="mime-string-decoding-method-alist">
-<p>
-Alist of encoding vs. corresponding method to decode string.
-<p>
-Each element looks like <code>(STRING . FUNCTION)</code>.
-STRING is content-transfer-encoding.
-FUNCTION is string decoder.
-</defvar>
-
 
-<h2> File $B$NId9f2=!&I|9f2=(B
-<node> File encoder/decoder
-<p>
 <defun name="mime-insert-encoded-file">
 	    <args> filename encoding
 <p>
@@ -707,24 +702,102 @@ Decode and write current region encoded by <var>encoding</var> into
 <var>start</var> and <var>end</var> are buffer positions.
 </defun>
 
-<defvar name="mime-file-encoding-method-alist">
+
+<h2> Other utilities
+<node> Encoding information
 <p>
-Alist of encoding vs. corresponding method to insert encoded file.
+<defun name="mime-encoding-list">
+	    <opts> SERVICE
 <p>
-Each element looks like <code>(STRING . FUNCTION)</code>.  STRING is
-content-transfer-encoding.  FUNCTION is function to insert encoded
-file.
-</defvar>
+Return list of Content-Transfer-Encoding.
+<p>
+If <var>service</var> is specified, it returns available list of
+Content-Transfer-Encoding for it.
+</defun>
 
-<defvar name="mime-file-decoding-method-alist">
+<defun name="mime-encoding-alist">
+	    <opts> SERVICE
 <p>
-Alist of encoding vs. corresponding method to write decoded region to
-file.
+Return table of Content-Transfer-Encoding for completion.
 <p>
-Each element looks like <code>(STRING . FUNCTION)</code>.  STRING is
-content-transfer-encoding.  FUNCTION is function to write decoded
-region to file.
-</defvar>
+If <var>service</var> is specified, it returns available list of
+Content-Transfer-Encoding for it.
+</defun>
+
+
+<h2> How to write encoder/decoder module
+<node> mel-backend
+<p>
+<defmacro name="mel-define-method">
+<args> name args <rest> body
+<p>
+Define <var>name</var> as a method function of (nth 1 (car (last
+<var>args</var>))) backend.
+<p>
+<var>args</var> is like an argument list of lambda, but (car (last
+<var>args</var>)) must be specialized parameter.  (car (car (last
+<var>args</var>))) is name of variable and (nth 1 (car (last
+<var>args</var>))) is name of backend (encoding).
+<p>
+Example:
+<p>
+<lisp>
+(mel-define-method mime-write-decoded-region (start end filename
+						    (nil "base64"))
+  "Decode and write current region encoded by base64 into FILENAME.
+START and END are buffer positions."
+  (interactive
+   (list (region-beginning) (region-end)
+	 (read-file-name "Write decoded region to file: ")))
+  (let ((str (buffer-substring start end)))
+    (with-temp-buffer
+      (insert (decode-base64-string str))
+      (write-region-as-binary (point-min) (point-max) filename)
+      )))
+</lisp>
+</defmacro>
+
+<defmacro name="mel-define-method-function">
+<args> spec function
+<p>
+Set <var>spec</var>'s function definition to <var>function</var>.
+<p>
+First element of <var>spec</var> is service.
+<p>
+Rest of <var>args</var> is like an argument list of lambda, but (car
+(last <var>args</var>)) must be specialized parameter.  (car (car
+(last <var>args</var>))) is name of variable and (nth 1 (car (last
+<var>args</var>))) is name of backend (encoding).
+<p>
+Example:
+<p>
+<lisp>
+(mel-define-method-function (mime-encode-string string (nil "base64"))
+			    'encode-base64-string)
+</lisp>
+</defmacro>
+
+
+<h2> How to add encoding/decoding service
+<node> generic function for mel-backend
+<p>
+<defmacro name="mel-define-service">
+<args> name
+<opts> args doc-string
+<p>
+Define <var>name</var> as a service for Content-Transfer-Encodings.
+<p>
+If <var>args</var> is specified, <var>name</var> is defined as a
+generic function for the service.
+<p>
+Example:
+<p>
+<lisp>
+(mel-define-service encoded-text-encode-string (string encoding)
+  "Encode STRING as encoded-text using ENCODING.
+ENCODING must be string.")
+</lisp>
+</defmacro>
 
 
 <h1> Header $B$N(B network $BI=8=(B
diff --git a/mime-ja.texi b/mime-ja.texi
index c2df06a..4c77393 100644
--- a/mime-ja.texi
+++ b/mime-ja.texi
@@ -1,13 +1,13 @@
 \input texinfo.tex
 @setfilename mime-ja.info
-@settitle{FLIM 1.9 MIME $B5!G=@bL@=q(B}
+@settitle{FLIM 1.10 MIME $B5!G=@bL@=q(B}
 @titlepage
-@title FLIM 1.9 MIME $B5!G=@bL@=q(B
+@title FLIM 1.10 MIME $B5!G=@bL@=q(B
 @author $B<i2,(B $BCNI'(B <morioka@@jaist.ac.jp>
 @subtitle 1998/07/01
 @end titlepage
 @node Top, Introduction, (dir), (dir)
-@top FLIM 1.9 MIME $B5!G=@bL@=q(B
+@top FLIM 1.10 MIME $B5!G=@bL@=q(B
 
 @ifinfo
 
@@ -433,9 +433,38 @@ representation-type $B$NL>A0$N@hF,$K(B @code{mm} $B$rIU$1$?$b$N$K$J$C$F(B
 @node mm-backend module,  , Request for entity, mm-backend
 @subsection mm-backend $B$N:n$jJ}(B
 
-$B!J$9$_$^$;$s!#$=$N$&$A=q$-$^$9(B (^_^;$B!K(B@refill
+@defmac mm-define-backend type &optional  parents
+
+Define @var{type} as a mm-backend.@refill
+
+If @var{PARENTS} is specified, @var{type} inherits parents.  Each parent
+must be representation-type.@refill
+
+Example:@refill
+
+@lisp
+(mm-define-backend chao (generic))
+@end lisp
+@end defmac
+
+
+@defmac mm-define-method name args  &rest  body
+
+Define @var{name} as a method function of (nth 1 (car @var{args}))
+backend.@refill
+
+@var{args} is like an argument list of lambda, but (car @var{args}) must
+be specialized parameter.  (car (car @var{args})) is name of variable
+and (nth 1 (car @var{args})) is name of backend
+(representation-type).@refill
+
+Example:@refill
+
+@lisp
+(mm-define-method entity-cooked-p ((entity chao)) nil)
+@end lisp
+@end defmac
 
-$B!J$H$j$"$($:!"(Bmm*.el $B$r;29M$K$7$F$/$@$5$$!K(B
 
 
 @node Content-Type, Content-Disposition, Entity, Top
@@ -692,12 +721,13 @@ FLIM $B$G$O(B Content-Transfer-Encoding $BMs$r9=J82r@O$9$k4X?t$rDs6!$7$^$9!#$
 
 @menu
 * Content-Transfer-Encoding parser::  Content-Transfer-Encoding $BMs$N2r@O4o(B
-* Region encoder/decoder::      $BNN0h$NId9f2=!&I|9f2=(B
-* String encoder/decoder::      $BJ8;zNs$NId9f2=!&I|9f2=(B
-* File encoder/decoder::        File $B$NId9f2=!&I|9f2=(B
+* encoder/decoder::             $BId9f2=!&I|9f2=(B
+* Encoding information::        Other utilities
+* mel-backend::                 How to write encoder/decoder module
+* generic function for mel-backend::  How to add encoding/decoding service
 @end menu
 
-@node Content-Transfer-Encoding parser, Region encoder/decoder, Content-Transfer-Encoding, Content-Transfer-Encoding
+@node Content-Transfer-Encoding parser, encoder/decoder, Content-Transfer-Encoding, Content-Transfer-Encoding
 @section Content-Transfer-Encoding $BMs$N2r@O4o(B
 
 @defun mime-parse-Content-Transfer-Encoding string
@@ -717,8 +747,8 @@ Content-Transfer-Encoding $BMs$,B8:_$7$J$$>l9g$O(B@var{default-encoding} $B$r
 
 
 
-@node Region encoder/decoder, String encoder/decoder, Content-Transfer-Encoding parser, Content-Transfer-Encoding
-@section $BNN0h$NId9f2=!&I|9f2=(B
+@node encoder/decoder, Encoding information, Content-Transfer-Encoding parser, Content-Transfer-Encoding
+@section $BId9f2=!&I|9f2=(B
 
 @defun mime-encode-region start end encoding
 
@@ -734,83 +764,123 @@ Decode region @var{start} to @var{end} of current buffer using
 @end defun
 
 
-@defvar mime-encoding-method-alist
-
-Alist of encoding vs. corresponding method to encode region.@refill
 
-Each element looks like @code{(STRING . FUNCTION)} or @code{(STRING
-. nil)}.  @var{string} is content-transfer-encoding.  @code{function} is
-region encoder and @code{nil} means not to encode.
-@end defvar
+@defun mime-decode-string string encoding
 
+@var{string} $B$r(B @var{encoding} $B$H$7$FI|9f$7$?7k2L$rJV$7$^$9!#(B
+@end defun
 
-@defvar mime-decoding-method-alist
 
-Alist of encoding vs. corresponding method to decode region.@refill
 
-Each element looks like @code{(STRING . FUNCTION)} or @code{(STRING
-. nil)}.  @var{string} is content-transfer-encoding.  @code{function} is
-region decoder and @code{nil} means not to decode.
-@end defvar
+@defun mime-insert-encoded-file filename encoding
 
+Insert file @var{FILENAME} encoded by @var{ENCODING} format.
+@end defun
 
 
-@node String encoder/decoder, File encoder/decoder, Region encoder/decoder, Content-Transfer-Encoding
-@section $BJ8;zNs$NId9f2=!&I|9f2=(B
+@defun mime-write-decoded-region start end filename encoding
 
-@defun mime-decode-string string encoding
+Decode and write current region encoded by @var{encoding} into
+@var{filename}.@refill
 
-@var{string} $B$r(B @var{encoding} $B$H$7$FI|9f$7$?7k2L$rJV$7$^$9!#(B
+@var{start} and @var{end} are buffer positions.
 @end defun
 
 
-@defvar mime-string-decoding-method-alist
 
-Alist of encoding vs. corresponding method to decode string.@refill
+@node Encoding information, mel-backend, encoder/decoder, Content-Transfer-Encoding
+@section Other utilities
 
-Each element looks like @code{(STRING . FUNCTION)}.  STRING is
-content-transfer-encoding.  FUNCTION is string decoder.
-@end defvar
+@defun mime-encoding-list &optional  SERVICE
 
+Return list of Content-Transfer-Encoding.@refill
 
+If @var{service} is specified, it returns available list of
+Content-Transfer-Encoding for it.
+@end defun
 
-@node File encoder/decoder,  , String encoder/decoder, Content-Transfer-Encoding
-@section File $B$NId9f2=!&I|9f2=(B
 
-@defun mime-insert-encoded-file filename encoding
+@defun mime-encoding-alist &optional  SERVICE
 
-Insert file @var{FILENAME} encoded by @var{ENCODING} format.
+Return table of Content-Transfer-Encoding for completion.@refill
+
+If @var{service} is specified, it returns available list of
+Content-Transfer-Encoding for it.
 @end defun
 
 
-@defun mime-write-decoded-region start end filename encoding
 
-Decode and write current region encoded by @var{encoding} into
-@var{filename}.@refill
+@node mel-backend, generic function for mel-backend, Encoding information, Content-Transfer-Encoding
+@section How to write encoder/decoder module
 
-@var{start} and @var{end} are buffer positions.
-@end defun
+@defmac mel-define-method name args  &rest  body
 
+Define @var{name} as a method function of (nth 1 (car (last
+@var{args}))) backend.@refill
 
-@defvar mime-file-encoding-method-alist
+@var{args} is like an argument list of lambda, but (car (last
+@var{args})) must be specialized parameter.  (car (car (last
+@var{args}))) is name of variable and (nth 1 (car (last @var{args}))) is
+name of backend (encoding).@refill
 
-Alist of encoding vs. corresponding method to insert encoded
-file.@refill
+Example:@refill
 
-Each element looks like @code{(STRING . FUNCTION)}.  STRING is
-content-transfer-encoding.  FUNCTION is function to insert encoded file.
-@end defvar
+@lisp
+(mel-define-method mime-write-decoded-region (start end filename
+						    (nil "base64"))
+  "Decode and write current region encoded by base64 into FILENAME.
+START and END are buffer positions."
+  (interactive
+   (list (region-beginning) (region-end)
+	 (read-file-name "Write decoded region to file: ")))
+  (let ((str (buffer-substring start end)))
+    (with-temp-buffer
+      (insert (decode-base64-string str))
+      (write-region-as-binary (point-min) (point-max) filename)
+      )))
+@end lisp
+@end defmac
 
 
-@defvar mime-file-decoding-method-alist
+@defmac mel-define-method-function spec function
 
-Alist of encoding vs. corresponding method to write decoded region to
-file.@refill
+Set @var{spec}'s function definition to @var{function}.@refill
 
-Each element looks like @code{(STRING . FUNCTION)}.  STRING is
-content-transfer-encoding.  FUNCTION is function to write decoded region
-to file.
-@end defvar
+First element of @var{spec} is service.@refill
+
+Rest of @var{args} is like an argument list of lambda, but (car (last
+@var{args})) must be specialized parameter.  (car (car (last
+@var{args}))) is name of variable and (nth 1 (car (last @var{args}))) is
+name of backend (encoding).@refill
+
+Example:@refill
+
+@lisp
+(mel-define-method-function (mime-encode-string string (nil "base64"))
+			    'encode-base64-string)
+@end lisp
+@end defmac
+
+
+
+@node generic function for mel-backend,  , mel-backend, Content-Transfer-Encoding
+@section How to add encoding/decoding service
+
+@defmac mel-define-service name &optional  args doc-string
+
+Define @var{name} as a service for Content-Transfer-Encodings.@refill
+
+If @var{args} is specified, @var{name} is defined as a generic function
+for the service.@refill
+
+Example:@refill
+
+@lisp
+(mel-define-service encoded-text-encode-string (string encoding)
+  "Encode STRING as encoded-text using ENCODING.
+ENCODING must be string.")
+@end lisp
+@end defmac