Subject: Re: Character entity mapping From: Anders Berglund <alb@xxxxxxxxxxxx> Date: Thu, 28 Aug 1997 12:07:06 -0400 |
[Chris Maden] >[Tony Graham] >> Personally, I contend that α should come from the Symbol font, >> and &agr; is what you should use if you want an alpha that looks >> like ordinary text (i.e. from the Greek code page). > >I agree, but unfortunately, ISO/IEC 10646 doesn't have different code >points for mathematical and linguistic Greek: > >geode-5> grep -i alpha iso10646.txt ><A%> /x03/x86 GREEK CAPITAL LETTER ALPHA WITH TONOS ><A*> /x03/x91 GREEK CAPITAL LETTER ALPHA ><a%> /x03/xac GREEK SMALL LETTER ALPHA WITH TONOS ><a*> /x03/xb1 GREEK SMALL LETTER ALPHA > >Since DSSSL uses 10646 as its internal character model, I don't think >there's a way to differentiate between the two characters without >registering a new character. Given 10646's limitations in the >technical areas, I think JaDE is doing the best it can. You are wrong in your description of the DSSSL character model - it is correct for JADE which has this (current only??) implementation limitation. It is precisely for reasons that you give that DSSSL does NOT use 10646 as its internal character model - 10646 is only used as a possible (& convenient) "shortcut" to a starting point of a character repertoire. A DSSSL "character" is a named object in an INFINITE namespace (needed for eg technical symbols - 10646 lacks close to 1000 of the ISO SDATA entities for math and technical symbols -, publishing symbols, ideograms for Far Eastern languages - estimated for the need in Chinese are of the order of 50 000 to 100 000 different characters -, etc, etc). DSSSL also defined a mechanism for mapping from these characters to glyphs. Jade, at least in its current implementation, ONLY supports a single pre-defined character repertoire and ignores the various character declarations defined in DSSSL. Thus I do not think "JaDE is doing the best it can" - it could do much better by implementing more of DSSSL! Anders > >-Chris DSSSList info and archive: http://www.mulberrytech.com/dsssl/dssslist
Current Thread |
---|
|
<- Previous | Index | Next -> |
---|---|---|
Re: Character entity mapping, James Clark | Thread | Re: Character entity mapping, Frank Christoph |
Re: DSSSL Tutortials?, Vivek Agrawala | Date | DSSSL Tutorials, Robin Cover |
Month |