I have used the rng tool to generate a grammar for sitemap.xmap, from sitemap-v04.dtd (patched version). I did this just to see how difficult it was. As expected, it did not work automatically - I had the same problem with dtd2xsd when trying to generate a WXS grammar.
The problem is the DTD effectively has two namespaces - the map: namespace and the global namespace. I guess as DTDs do not support namespaces, the conversion tools do not attempt to cope with this. Still, I was able to systematically correct the grammar, so I could automate the process with an emacs macro or some such. The generated grammar is equivalent to the DTD grammar, and as such fairly loose. I could go on to express the rules better now (e.g. map:components should have at most one child of each type, but in any order). Then perhaps write an ant validation task, or maybe runtime validation through an coccon.xcong option? -- Colin Paul Adams Preston Lancashire --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED]
