[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] RE: Are we losing out because of grammars?
Going offlist to save some mush brained mail and the embarassment of not knowing what the heck this thread is about. I think I agree, but I may be losing out on interpreting the score card of who wants what where. Brain fry perhaps from writing an article about applying ontology-beyond-search. It was a hard paper and I probably screwed it up. Oh well. Back to the doofusBranch for Len... In some cases, one wants to define a production (content model) that generates a context for a value. In other cases, one wants to define a rule that tests a value in a context. The means for both have overlapping powers to express this, but one can be terser. That is, a kolmogorov complexity test would suggest the superiority of one of these means for some output. In other cases, one and only one of these means works. I understand that there are things which can't be checked from the schema grammar (co-occurence) and that is fine so far. It is a real and immediate requirement to apply languages such as Schematron in addition to an XML Schema. I can't understand if someone wants to: 1) Get rid of schema and use rules-based languages in all cases or vice versa 2) Make sure that both rules and grammars are expressible in schemas *ASAP* thus tossing XML Schema back to committee for another year. I guess I understand that one might want to ensure 2) can be done at some future point by some standard means such as what Clark and the others are discussing. I understand the need to do both. Given a document en route among different owners using different systems with different local rules I understand the need to be able to separate into different documents rules that encode the production of contexts from documents that check values in contexts. So I think I understand what is lost if only grammars are provided. But given Schematron, that isn't the case. So where is this thread headed? Len http://www.mp3.com/LenBullard Ekam sat.h, Vipraah bahudhaa vadanti. Daamyata. Datta. Dayadhvam.h
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