[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: [schema] which assertions can't you express ?
> Now, how do I create a schema to represent this considering that is is > indexed by the attribute value of id? w3c xml schema can't really do anything about that as it can't express different content models for section elements depending on its id attribute, but Relax NG or schematron (for example) could be used to express constraints on such a document type. even w3c schem can express some things, it can't base the content model of child elements based on the attribute value but it can base it on its possition in the hierarchy, so you could for example state that the top level section has to have id="report definition" and that its section children have to have id="officers" or ... and that their section children have to have ids "name" or "appointment date" etc. You couldn't though express requirements such as <section id="name"/> comes before <section id="date of birth"/> in W3C schema, unlike relax ng or schematron. David ________________________________________________________________________ This e-mail has been scanned for all viruses by Star. The service is powered by MessageLabs. For more information on a proactive anti-virus service working around the clock, around the globe, visit: http://www.star.net.uk ________________________________________________________________________
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