[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Another reason why namespaces URLs should not be schemas
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...)
|
PURCHASE STYLUS STUDIO ONLINE TODAY!Purchasing Stylus Studio from our online shop is Easy, Secure and Value Priced! Download The World's Best XML IDE!Accelerate XML development with our award-winning XML IDE - Download a free trial today! Subscribe in XML format
|