[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Common XML (was Re: Document Feature Requirements)
Sean McGrath <sean@d...> writes: > [David Megginson] > >You might be a little overly optimistic in assuming that any markup > >has good survival characteristics in the general case -- it's the > >model that matters, not the markup. > > I have read the above 5 times now and I'm afraid it has gone > over my head. Can you explain what you mean by this? XML is an interchange format -- that means that it's used to exchange information that follows some other model. When the XML passes through a non-XML system and comes back out as XML on the other end, only those things that are represented in the model are likely to come out again. This is not so noticable with documents (I know that a lot of people hate the document/data distinction, but live with guys), because a lot of them follow a model (as expressed in the Infoset and implemented in DOM, XPath, etc.) that is very close to the XML representation itself; this is *very* noticable with data, which tends to pass through application-specific RDF tuples, Perl objects, SQL tables, C structures, etc., and come out on the other end completely changed, especially if there is more than one possible XML representation for the same logical information. All the best, David -- David Megginson david@m... http://www.megginson.com/ *************************************************************************** This is xml-dev, the mailing list for XML developers. To unsubscribe, mailto:majordomo@x...&BODY=unsubscribe%20xml-dev List archives are available at http://xml.org/archives/xml-dev/ ***************************************************************************
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