Re: Again wit da AND and Repetitions
At 5:11 PM 5/14/99, roddey@u... wrote: >>>Does anyone believe that these can be done in less than brute force tree >search >>>times? >> >>XML requires deterministic content models. This allows validators to do >>their job without having to look more than one element ahead or do brute >>force tree searches. > >Actually it does not require deterministic models, it just allows you to check >for them. And, I guess its not really what XML does or does not do that's in >question here, its what the new upcoming schema spec proposes to do that's at >issue. The XML 1.0 specification, 3.2.1 states that: "For compatability, it is an error if an element in the document can match more than one occurance of an element type in the content model". See also Appendix E to the specification, which describes in further detail what is meant by a deterministic and ambigous content model. It follows from the definition that a validating XML parser doesn't have to look ahead. This is important as it simplifies implementing validation. -- Terje <Terje@i...> | Media Design in*Progress Software for Mac Web Professionals at <http://www.in-progress.com> Take advantage of XML with Emile, the first XML editor for Mac. 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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