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[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] RE: XHTML and also XML
 Would this mean that without parameterization of DTD, it is not possible to have valid XML with "elements from mutiple namespaces". >-----Original Message----- >From: David Brownell [mailto:david-b@p...] >Sent: Wednesday, October 24, 2001 11:45 PM >To: Suresh Babu Koya; xml-dev@l... >Subject: Re: XHTML and also XML > > >> Please help me by informing me if it is possible to have >a "Valid" XML >> document complying >> to multiple DTD's without having to "dump" the whole >content of all the >> DTD's in a single dtd. > >An XML document has a single DTD, but the DTD includes more >than just the "external subset". For example, maybe the DTD you >want looks something like: > > <!DOCTYPE html > PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" > "D:/work/XML/DTDs/xhtml1-strict.dtd" > [ > <!ENTITY % bc-dtd "d:/work/XML/book.dtd"> > %bc-dtd; > ]> > >I said "more like", since I don't think the XHTML 1.0 DTDs >can be used quite that way. Look at XHTML 1.1 instead; >it's a better setup for DTD merging. > > >> Is it possible to use namespaces for validating according >to DTD's as >> below? > >No. Namespace syntax is ignored by DTDs. > > >> Am I misinterpreting the Validity definition by saying that >"A XML document >> will be valid if >> if all the elements in the default namespace would be >logically organized >> as defined in the DTD." > >Yes, you're misinterpreting. The notion of namespaces was >defined well after DTDs were defined; so DTD validation >doesn't care (or know) about namespaces. > >You can use both namespaces and DTDs, but you'll not be >changing namespace prefixes. Namespaces themselves >don't help if you're trying to merge two DTDs, but you can >use the same sorts of parameterization techniques used in >the XHTML 1.1 DTD if that's your goal. > >- Dave > > > 
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