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From: David Megginson <david@m... >SGML does nothing that XML cannot do. I don't know how Dave can say that. For example, many asian documents use user-defined characters (East Asian character sets have a special code space reserved for these, and East Asian word processing applications come bundled with font editors to allow definition of user-defined characters). In SGML I can short-reference these codepoints to entity which points to the appropriate glyphs and which has other data attributes to describe character properties. In XML, to do this I have to write a special program to simulate this behaviour. And if the program just inserts elements rather than entity references (because XML has no attributes on entities, so I have to use elements), my element structure is made more complicated. Furthermore I cannot use elements inside attribute values, while I can use entity references. The lack of this kind in XML has closed off the obvious and simple solution to private-use area (PUA) characters: East Asians and MathML could each have found it useful. Rick Jelliffe xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev@i... Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ and on CD-ROM/ISBN 981-02-3594-1 To (un)subscribe, mailto:majordomo@i... the following message; (un)subscribe xml-dev To subscribe to the digests, mailto:majordomo@i... the following message; subscribe xml-dev-digest List coordinator, Henry Rzepa (mailto:rzepa@i...)
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