[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: XML trade off 1 - DTD vs XML Schema
IMHO, DTDs are far superior to the incredibly bloated form the XML Schema seems to be turning into. Although you *do* have to go learn a little BNF to understand them, I challenge anyone to translate an XML Schema to a mental model without the aid of either paper or machine. It'd take less time to just learn BNF. Of course, DTDs have some problems, each of which stikes me as something which can be easily rectified in ways which would allow old DTDs to conform to the new spec: add namespace support add user-defined types (INTEGER="[-][0123456789]+") add SGML's & so I can be more specific about my content model let me mix PCDATA and other elements in something other than | Maybe there are one or two other things, but just a few small changes like that and XML Schema would suddenly be a lot less interesting. Seems odd to me that they are going in such a radically different direction over at W3C when DTDs are *so close* to being the right solution. (Yeah, yeah, I know that DTDs cannot represent big nasty object models with inheritance and whatnot, but why not just translate an existing standard into XML syntax for that purpose?) -Joshua Smith 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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