[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Weak DTDs
Sean Mc Grath wrote: > <Statement InvititationForTrouble=TRUE"> > HyTime allows parsing w.r.t. a meta-DTD via HyTime aware parsers. However, > I think there are many occasions when there is nothing "meta" involved. Just > a desire to parse w.r.t to an alternative schema. Not a meta-schema - just > a different schema. > </Statement> That's absolutely true. And ARCHFORMS absolutely allow this. That is why calling them "meta-DTDs" is very misleading. The archform feature allows you to specify a mapping from elements to element types using attributes, rather than GIs. This is very similar to CONREF except that you can use minimization features like #FIXED, default values, #CURRENT, LINK and also some archform specific minimization features to make the mapping without putting an attribute on every element the way you must with GIs. In fact, sometimes you can make the mapping without putting an attribute on any elements at all. Then you can seem to set up a mapping between element types in one DTD and element types in another DTD. Thus you have the illusion of a DTD to DTD relationship rather than an instance to DTD relationship. That's when archforms seem like a "meta-DTD". But in the general case where you ignore minimization, archforms are not really "meta" anything. They are alternate DTDs validated according to attribute values, not GIs. Paul Prescod 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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