Cart
[Home] [By Thread] [By Date] [Recent Entries]
Bob Foster wrote: > Unique particle attribution is normative and not optional, but not all > processors check it correctly and some processors check it optionally. > Of course that leads to interoperability errors, and not just around > UPA, but that's the state of the art. Whilst UPA assists a particular style of implementation, it kills a lot of the expressiveness of W3C schema. It certainly prevents being able to evolve a given schema. It's also obvious that a processor using schema to build a code model is able to ignore UPA and still get its work done. So I wonder if there isn't a case for a standard schema 1.0 extension: a flag to indicate 'this schema is valid except it violates UPA restrictions'. It wouldn't be backwards compatible with a strictly compliant 1.0 schema validator, but could be useful in a specific processing domain such as Web services. Paul -- http://blog.whatfettle.com
|
