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Subject: Q: How do I use entities like – in DocBook V5.0?
http://kosek.cz/temp/dbng-howto.html#d5e446 "How do I use entities like – in DocBook V5.0? Modern schema languages (including RELAX NG and W3X XML Schema) do not provide any means to define entities that can be used for easier typing of special characters. Some editors provide functions or special toolbars that allow you to easily pick necessary character and insert it into document as a raw Unicode character or a numeric character reference." I'm having some trouble understanding exactly why these "modern" schema languages don't support character entity references. It seems the expressiveness of XML should make providing that functionality easier. In the case of MathML, it makes a lot of sens to use named characters entities. To some (significant) extent working with MathML by hand, and reading the XML adds to the intellectual value of the document model. In addition, it is always a good idea to be able to fall back to a human readable form, and it's even helpful to have names for symbols such as LeftRighDoublArrow==hArr==biconditional. when working with math, it make the most sense to call it a biconditional. If you were just using it to be using it in a webpage, hArr, might make the most sense, and when trying to describe the symbol in terms of the category of symbols it belongs to according to shape and style, the longer name is useful. People created these names for a reason. I do not believe they are obsolete. I hope we can find a way to port that aspect of the traditional DTD/SGML technology to the newer encoding languages. Steven
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