[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Elements cannot be described more than once in DTD, right ?
Pavel Velikhov wrote: > > How can I express in DTD that affiliate operations in 'set' and 'get', > > and that merchant has only the 'signup' ? > > You cannot. This is a fundamental problem with DTDs, you will have to > declare > operations as (get|set|signup). XSchema can get around this problem. I don't think that I'd call this a "fundamental problem" any more than I'd complain about not being able to translate a (deprecated) SGML content model such as: (foobar, #PCDATA) into XML. I can use the XML content model: (#PCDATA | foobar)* in absolute comfort, but wary of the fact that I need to do a semantic check to ensure that I'm conforming to the intention of the original content model. Schemas will provide a tidy way of rolling the structure and semantic checks together, but the concept is the same. > It is interesting to find out whether this is a serious problem for you, > or something that you can get around/tolerate. I'd be a bit surprised if anyone considered this to be a serious problem and amazed if it was intolerable. :-) Schemas are interesting and will probably play a big role in times to come, but I don't believe that they offer anything that can't currently be done by other means. -- Regards, Marcus Carr email: mrc@a... ___________________________________________________________________ Allette Systems (Australia) www: http://www.allette.com.au ___________________________________________________________________ "Everything should be made as simple as possible, but not simpler." - Einstein 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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