Re: Between raw and cooked II: Are? DTDs are just for validation
David Brownell wrote: >> Jonathan Borden writes: >> >> > Beyond requiring that external entities and default attributes be >> > expanded, is there a way to allow non- and validating parsers to >> > process the same XML documents in a functionally similar fashion, >> > that is, the same SAX events be fired or the same DOM tree be >> > constructed whether or not validation is employed? > >Absolutely: when a nonvalidating parser reads all external entities, >it behaves almost exactly like a validating parser that's configured >to ignore validity errors. > You misunderstand me. I understand that it is possible for validating and non-validating parsers to generate the same parse tree, what I am looking for is a specification that parsers need meet to *ensure* that this occurs. It is this specification that needs to be given an official standing for use by XML applications. Unless I am otherwise missing something (which was the question), the only way to ensure that identical parse events and trees are generated by validating and non-validating parsers is to specify that external entities and default attributes etc. be expanded. Aelfred, the sun,ibm, and microsoft parsers provide identical parse trees *because* entities are expanded and attributes are defaulted. Everyone agrees that non-validating parsers *may* expand external entities and default attributes. The probem with XML is that this behavior is *optional* for non-validating parsers. This behavior is also the default behavior of IE5's parser. The problem is that this behavior, common to aelfred, ibm, sun and microsoft' parsers has no official standing, nor name, which is why I suggested that this be termed "well-behaved" (ok pick something less contentious but just pick something!!) and be given a specific standing in the XML spec. That way, as an XML application writer I can specify the needed features of the parser in terms of a spec. Jonathan Borden http://jabr.ne.mediaone.net 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/ and on CD-ROM/ISBN 981-02-3594-1 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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