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On Nov 30, 2006, at 12:01, Jirka Kosek wrote: > You need schema for dozen of other things than validation. For > example, > XML editors can be driven by schema to provide more comfortable data > entry to users. Why does an editing schema need to be frozen and not be customizable as well? One thing that I have learned in the HTML5 conformance checking project is that validation when augmented with Schematron and editing with RELAX NG only call for different schemas. >> Suppose the schemas James Clark wrote for XHTML 1.0 had been >> normative. >> Would it have been good it Petr Nálevka had been accused of >> breaking a >> normative schema when he made bug fixes and tightened the schemas >> with >> Schematron? Would it be a good idea if I'd be accused of breaking a >> normative schema if I tightened the schemas further by e.g. using the >> datatype library that I've been developing for HTML5? ( >> http://hsivonen.iki.fi/html5-datatypes/ ) > > Well, according to this logic, shouldn't be then proponents of HTML5 > accused? ;-D Accused of what? The (X)HTML5 schemas fantasai and I are developing have no normative status whatsoever. If the spec and the schema disagree, the schema has a bug that needs to be fixed. (The schema is not done, yet, and has known bugs. The spec isn't done, yet, either.) >>> I think that problem is in education here -- it is not a big deal to >>> show and explain difference between valid and conformant document. >> >> To me, it seems that the WHATWG is interested in people producing >> conforming documents but not interested in a lesser notion of >> validity >> that is based on the arbitrary limitations of a particular schema >> language. > > But it would be easier if they will define additional constraints > on top > of schema validity then to duplicate work which can be easily > expressed > using schemas. That's what I am doing, but it is an implementation detail. The spec makes the normative statements in English. It is up to me to decide how I implement the checking for each requirement. -- Henri Sivonen hsivonen@i... http://hsivonen.iki.fi/
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