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[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Another reason why namespaces URLs should not be schemas
 We have addressed this problem in XML Schema with the import/include distinction. Please take a look. At 05:07 AM 6/18/99 +1000, Rick Jelliffe wrote: >If I am using XHTML and I decide to refine my >document type so that headers must be inside divisions, >what do I do (if namespace URLs can be resolved to >schemas)? > >Presumably, I have to derive a new schema based on >the old one, with a new URL; then I have to use that new >URL as the namespace URL. Then IE 5 and everything >that works by using the namespace URL to signify the >operation of an element will be broke. > >This seems to me to be unworkable: if I make > ><html xmlns="http://rick.com.xx/my-html.xmlschema"> >... ></html> >then a rendering engine has to download my corpulent (not to >mention grumous) XML schema before it can find out that >in fact my element types are HTML. > >So it seems that overloading the function of the namespace >URI to also be a schema URL would have a bad effect on >XHTML with data islands etc, or on any DTD derived from >DTDs that are built into the processor. > >It seems that the situation we are reaching is that the >namespace prefix is being treated as unique for famous >DTDs (e.g. how IE 5 treats html:) and that the >URL is being used as a schema name. If people want >to do this, that is fine, but it does not correspond to namespaces >(in fact, it corresponds more to what I suggested in >XML-Bind -- a simple prefixing system to make >automated renaming more manageable and a way to >bind names to schemas, except I suggested regular expression >matching not just the prefix). > >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...) > > ---------------------------------------------------------- Murray Maloney, Esq. Phone: (905) 509-9120 Muzmo Communication Inc. Fax: (905) 509-8637 671 Cowan Circle Email: murray@m... Pickering, Ontario Web: http://www.muzmo.com Canada, L1W 3K6 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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