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www.w3.org -----Original Message----- From: Purvesh To: xml-dev@l... Sent: 9/6/01 8:07 PM Subject: Help Can somebody give me exact links for specifications of the following: XML XSL CSS DTD Schema SAX DOM Thanks in advance.. Purvesh ----- Original Message ----- From: <Tony.Coates@r...> To: <xml-dev@l...> Sent: Thursday, September 06, 2001 3:39 AM Subject: RE: XML Schemas: Best Practices ? Versioning > > On 05/09/2001 19:56:47 Michael Brennan wrote: > > >I don't think 3 and 4 are reliable. #3 makes the incorrect assumption that > >"instance documents give the name and location of the associated schema". This > >is undoubtedly the prevalent case, but as sound entity resolution mechanisms > >gain more widespread use, I'm inclined to believe there will be less and less > >of this. You cannot assume a consuming application is relying upon the > >"schemaLocation" attribute (or even paying any attention to it). I think > >changing the target namespace is the only reliable approach. > > Once again, too much emphasis on the belief that everything should work even if there is no "schemaLocation" given. I really believe that taking this view, which does not seem to be the view of the W3C people I've talked to, will just lead to more complication than is necessary. > > >In spite of the complications it poses, I think #2 is the best practice. > >True, instance documents and schemas that include the relevant schema must > >change to reference the new version, but that is often a good thing. You don't > >want those references to indiscriminately change to reference a new schema > >without assurance that there are no incompatibility issues. Indeed, by > >changing the namespace, you can permit concurrent use of different versions of > >a schema, allowing users time to migrate to the new version as compatibility > >is assured. > > The same is true if you insist on a versioned "schemaLocation". > > Cheers, > Tony. > ======== > Anthony B. Coates > (1) Content Distribution Architect - Project Gazelle > (2) Leader of XML Architecture & Design - Chief Technology Office > Reuters Plc, London. > Tony.Coates@r... > ======== > > > > ----------------------------------------------------------------- > Visit our Internet site at http://www.reuters.com > > Any views expressed in this message are those of the individual > sender, except where the sender specifically states them to be > the views of Reuters Ltd. > > ----------------------------------------------------------------- > The xml-dev list is sponsored by XML.org <http://www.xml.org>, an > initiative of OASIS <http://www.oasis-open.org> > > The list archives are at http://lists.xml.org/archives/xml-dev/ > > To subscribe or unsubscribe from this elist use the subscription > manager: <http://lists.xml.org/ob/adm.pl> ----------------------------------------------------------------- The xml-dev list is sponsored by XML.org <http://www.xml.org>, an initiative of OASIS <http://www.oasis-open.org> The list archives are at http://lists.xml.org/archives/xml-dev/ To subscribe or unsubscribe from this elist use the subscription manager: <http://lists.xml.org/ob/adm.pl> |
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