-Internet \e$B$NEE;R=q4J!&%M%C%H%K%e!<%9$J$I$N=qLL\e(B (message) \e$B$NI=8=7A<0$O\e(B STD
-11 \e$B$K4p$E$$$F$$$^$9!#\e(BSTD 11 \e$B$N=qLLK\BN\e(B (message body) \e$B$O9T$rM#0l$N9=B$$H\e(B
-\e$B$9$k4J0WJ8LL\e(B (plain text) \e$B$G$"$j!"J8;zId9f$b\e(B us-ascii \e$B$HDj$a$i$l$F$$$^$9!#\e(B
-\e$B<B:]$K$O!"J8;zId9f$r\e(B us-ascii \e$B$NBe$o$j$K$=$N8@8l7w$GMQ$$$i$l$kJ8;zId9f$H\e(B
-\e$B$7$?!XCO0h2=$5$l$?\e(B STD 11\e$B!Y=qLL$bMQ$$$i$l$F$-$^$7$?$,!"$3$N>l9g$b=qLL$N\e(B
-\e$BJ8;zId9f$O#1$D$G$9!#$3$N$?$a!"MxMQ<T3&LL\e(B (Message User Agent) \e$B$O!"$7$P$7\e(B
-\e$B$P!"\e(Bbyte \e$BNs\e(B = us-ascii \e$BJ8;zNs!"$J$$$7$O!"\e(Bbyte \e$BNs\e(B = \e$B$=$N8@8l7w$GMQ$$$kJ8\e(B
-\e$B;zId9f$NJ8;zNs$N$h$&$K8+Jo$7$F$-$^$7$?!#\e(B@refill
-
-\e$B$7$+$7$J$,$i!"\e(BMIME \e$B$G$O=qLL$O\e(B entity \e$B$rC10L$H$9$kLZ9=B$$K$J$j!"$^$?!"#1\e(B
-\e$B$D$N=qLL$GJ#?t$NJ8;zId9f$rMQ$$$k$3$H$,$G$-$^$9!#$^$?!"\e(Bentity \e$B$NFbMF$OJ8\e(B
-\e$BLL$d3($N$h$&$JC1=c$KI=<(2DG=$J$b$N$@$1$G$J$/!"2;@<$dF02h$J$I$N0lDj;~4V:F\e(B
-\e$B@8$5$l$k$h$&$J$b$N$dFCDj$N%"%W%j%1!<%7%g%s$N%G!<%?$d%W%m%0%i%`$N%=!<%9!"\e(B
-\e$B$"$k$$$O!"\e(Bftp \e$B$d\e(B mail service \e$B$NMxMQK!$d\e(B URL \e$B$H$$$C$?7A$GI=$5$l$?30It;2\e(B
-\e$B>H$J$I$N$5$^$6$^$J$b$N$,9M$($i$^$9!#$3$N$?$a!"I=<($@$1$r9M$($F$$$?\e(B STD
-11 \e$B$K$*$1$kMxMQ<T3&LL$NC1=c$J1dD9$G$O\e(B MIME \e$B$NA4$F$N5!G=$r07$&$3$H$O$G$-\e(B
-\e$B$^$;$s!#$D$^$j!"\e(BMIME \e$B$N7A<0$K9g$o$;$FI|9f$9$k$@$1$G$OIT==J,$G$"$j!"MxMQ\e(B
-\e$B<T$H$NBPOCE*$J:F@8=hM}$r9MN8$9$kI,MW$,$"$j$^$9!#\e(BMIME \e$B=qLL$N7A<0$O<+F0=h\e(B
-\e$BM}$,$7$d$9$/@_7W$5$l$F$$$^$9$,!"\e(BMIME \e$B=qLL$K4^$^$l$kFbMF$NCf$K$O%;%-%e%j\e(B
-\e$B%F%#!<>e$NLdBj$+$i<+F0=hM}$r$9$k$Y$-$G$J$$$b$N$,$"$j!"$3$&$$$C$?$b$N$N:F\e(B
-\e$B@8$K4X$7$F$OMxMQ<T$NH=CG$r6D$0$h$&$K@_7W$5$l$k$Y$-$G$7$g$&!#7k6I!"\e(BMIME
-\e$B=qLL$r07$&$?$a$K$O\e(B STD 11 \e$B$*$h$S\e(B MIME \e$B$N9=J8$G5-=R$5$l$?%a%C%;!<%8$N>pJs\e(B
-\e$B8r49MQI=8=$H$=$N2r<a7k2L$G$"$kI=<(2hLL$d:F@8Ey$N=hM}$r6hJL$7$F9M$($kI,MW\e(B
-\e$B$,$"$j$^$9!#$^$?!"MxMQ<T$H$NBPOCE*$J:F@8=hM}$,I,MW$G$9!#\e(B@refill
-
-\e$B$3$N$?$a!"\e(BMIME-View \e$B$O#1$D$N=qLL$KBP$7$F!">pJs8r49MQI=8=$r3JG<$9$k\e(B
-mime-raw-buffer \e$B$HI=<(MQI=8=$r3JG<$9$k\e(B mime-preview-buffer \e$B$N#2$D$N\e(B
-buffer \e$B$rMQ$$$^$9!#\e(B@refill
-
-MIME-View \e$B$O\e(B mime-preview-buffer \e$B$KBP$7$F\e(B mime-view-mode \e$B$H$$$&\e(B MIME
-message \e$B$r1\Mw$9$k$?$a$N\e(B mode \e$B$rDs6!$7$^$9!#MxMQ<T$O$3$3$G3F\e(B entity \e$B$K\e(B
-\e$BBP$7$FA`:n$r9T$&$3$H$,$G$-$^$9!#\e(B
+The representation form of the internet messages in electric letters
+or in net news is based on STD 11. The STD 11 message body is a plain
+text which consists of lines as its only structure, and the character
+code is fixed as us-ascii. Actually, there are ``localized STD 11''
+messages that use some character code in their linguistic range
+instead of using us-ascii. Even in that case, the character code in
+the message is single. Therefore, Message User Agents have considered
+(byte row) = (us-ascii string), or (byte row) = (string in the
+character code in the linguistic range).@refill
+
+Although, the MIME message has the tree structure in entity unit.
+And one message can contain multiple character codes. The content of
+an entity can be not only a letter or an image that can be displayed
+simply, but also can be a voice or an animation that are played for
+some time interval, a data for some specific application, a source
+code of some program, or an external reference that consists of
+the usage of ftp or mail service, or some URL. Therefore the simple
+extension of STD 11 user interface, which only consider displaying
+the message, cannot treat all of the MIME functionalities.
+Then it is not sufficient to decode message along its MIME type, but
+it is also required to consider a playback processing through some
+dialogue with the user. The format of MIME messages is designed
+to easily be passed to automatic processing. But some contents in the
+MIME message should not be passed to automatic processing for security
+reasons. So it should be designed to ask user in such cases.
+After all, in order to deal with MIME message, it is required to
+distinguish the representation for information exchange which is
+written in STD 11 or MIME construction, and its result
+after some interpretation which is a display screen or a playback
+process. It is also needed to converse with user for playback
+processing.@refill
+
+Therefore, MIME-View uses two buffers for one document, one is the
+mime-raw-buffer that stores the representation for information exchange,
+and the other is the mime-preview-buffer that stores the representation
+for displaying.@refill
+
+MIME-View provides a mode in the mime-preview-buffer for reading MIME
+message, which is called as mime-view-mode. User can manipulate each
+entity there.