[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Is the XML Schema Test Collection still alive
On 4/13/05, Gregor <gregor@m...> wrote: > 1. Is the schema test collection (especially the microsoft test case) still > usable e.g. uptodate with XML Schema 1.0se and generally thought to be > correct? I'm investigating this at Microsoft and hope to get more information. > 3. An Implementation problem: > What parser set up did the original contributors use to test Xerces? (I get > Xerces2 (Java Parser 2.6.2) to validate the Schema4Schema against its dtds > but I run into problems trying to validate a Schema against the > Schema4Schema or is there some easyer way to tell a valid XML Schema from an > invalid one? This touches on a larger issue of schema interoperability and "validating the validators". There is a W3C workshop on the general question of Schema user experiencesin June - http://www.w3.org/2005/03/xml-schema-user-cfp It will be interesting to see what others conclude. My impression is that there are a lot of industry schemas out there that do not actually conform to the spec, and a lot of validators that do not enforce the spec. That puts people in a bind, since they don't know what to trust, and the schema spec is far too cryptic for most people to judge for themselves. Does anyone violently disagree with this assessment? I would strongly urge people who have practical experience in this area to participate in the workshop, or at least talk about your experiences on xml-dev or schema-dev so that we all have the benefit of your information. By the way, most of the people who are trying to sort this all out at Microsoft believe that W3C and the industry should be investing energy in sorting out XML 1.0 and XSD 1.0 interoperability challenges and building confidence that tools and schemas are correct before complicating the picture by moving to new versions of these specs. Many people don't appear to realize, for example, that XML 1.1 (the latest Recommendation) and Schema 1.0 (the latest Recommendation) can't really be used together. Of course, one plausible way forward is to move to Schema 1.1 ASAP, but we believe that the more prudent alternative is to stabilize the foundation before adding new floors on top of what is now a bit shaky. This argument has been made most forcefully with respect to "Binary XML", but it applies to other areas where people wrestle with real-world interop challenges.
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