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[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Victory has been declared in the schema wars ...
 Jirka Kosek said: > Henri Sivonen wrote: > >> 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. > > In what sense different? You have RELAX NG + Schematron and for > validation you use both schemas, but XML editor will probably use only > RELAX NG when doing code completition. What's the problem here? Validation of packing constraints are a really specialized problem: possibly you can do 1 dimension packing checks with Schematron, but 2-D or 3D packing constraints on arbitary number objects or arbitrary sizes is not something that you would expect from a general purpose schema or simple constraint language. Maybe a constraint language with higher-order logic could do it...or a schema language that was more like a spreadsheet. But things like table validation are a degenerate case of packing checking. I think Schematron can certainly validate edge constraints (the max number of cols may not exceed the @colspec attribute, for example) but not where you have arbitrary tables with irregular cells, elidable cell declarations, spans, straddles, and so on. Cheers Rick Jelliffe 
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