[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Combining DTDs
At 05:21 PM 9/11/98 +0000, Peter Murray-Rust wrote: >I agree with this. I have written two DTDs in XML (CML and VHG) both of >which have to interoperate with other *unknown* DTDs. As a simple example, >a paper in chemical physics requires (at least) xHTML, MathML, CML, RDF and >DC. It is inconceivable that a generic DTD can be created that has valid >content models for all conceivable applications in this domain. [It *is* >conceivable that the J.Chem Phys produces a DTD and it's also highly >probable that if J. Phys Chem also does it would use a different one.] I >cannot see how, except in very carefully regulated domains (such as legal, >patent, regulatory) it will be possible to combine generic DTDs to provide >a useful mixture. For example, if someone wishes to embed a <price> in a ><molecule> this is a perfectly possible and reasonable thing to do. Why >should I say they can't? > I wonder if a mechanism similar to Java's "import" statement would help address some of the problems in combining DTDs? If such a mechanism existed, you could address a DTD and import only the element definitions you needed (which, hopefully, would either solve the problem of different definitions for a given element or make you more aware of name collisions across multiple DTDs). For example, you could feed your parser something like: import DTDname.elementname; or import DTDname.m*; or import DTDname.*; to tell it that it should only recognize and use certain elements from the named DTD. Chris ------------------------------------------------------ "Don't *say* things. What you *are* stands over you the while, and thunders so that I cannot hear what you say to the contrary." --- Emerson, "Social Aims" xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev@i... Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ To (un)subscribe, mailto:majordomo@i... the following message; (un)subscribe xml-dev To subscribe to the digests, mailto:majordomo@i... the following message; subscribe xml-dev-digest List coordinator, Henry Rzepa (mailto:rzepa@i...)
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