[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Namespace URI address resources
At 10:44 AM 6/16/99 +1000, Rick Jelliffe wrote: >A schema is "processing" not "data": it is tied to whatever applications >understand the schema format. Editing, creating and validating against a >schema are all applications. Well. Maybe meta-data, but a schema is simply declarative. It does not perform any processing. Editing, creating and validating are all applications. So what? The point is that a schema actually defines some aspect of the meaning of 'names' in a 'namespace'. That seems useful. >There is no schema language yet that can express all useful constraints. >To propose a mechanism that does not allow a plurality of schemas is, in >fact, to say that the schema language should defines the (bounds of the) >possible schemas: if XML-Data does not support a constraint, it cannot >be part of schemas. This is putting the cart before the horse. Using the namespace URI to be locate a schema does not preclude the possibility of there being any number of schemas associated with that URI. > >It is not that the namespace URI identifies a schema that it is the >problem, it is : > >* the notion that a document has only *one* schema and >* there is no mechanism yet to allow alternative schemas to be assigned. Nobody is proposing that a document has only *one* schema. The mechanism is known in the biz as 'content negotiation'. This is known to work for multiple languages and devices. > >If W3C made a mechanism to allow alternative schemas (like Jonathon >Bordon's recent post), then the namespace URI could be overloaded to >provide a schema, as a defaulting behaviour in the absense of a PI. But >it is bad for the WWW if there is no mechanism to allow alternatives; >without such a mechanism, requiring overloaded use of the namespace URL >is bad. As I said, there is such a mechanism. Regards, Murray ---------------------------------------------------------- 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...)
|
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
|