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Per section 3.3 When more than one AttlistDecl is provided for a given element type, the contents of all those provided are merged. When more than one definition is provided for the same attribute of a given element type, the first declaration is binding and the later declarations are ignored. In your example, the definition in the internal DTD, <!ATTLIST FOO BAR CDATA "XYZZY"> is processed first so it takes precedence over the definition in the external DTD. > -----Original Message----- > From: Peter@u... [SMTP:Peter@u...] > Sent: Thursday, June 12, 1997 11:53 AM > To: xml-dev@i... > Subject: RE: Repeating attribute specifications > > In message > <011290D45A8ACF119B8B00805FD471D60344E247@R... > > David Schach writes: > > I think Tim misunderstood your question. In the XML DTD, it is > legal to > > have multiple AttistDecl's for a given element type (see section > 3.3). > > This doesn't change the validity constraint of section 3.1. > Attributes > > in tags have to be unique. > > I think I have misunderstood the answers as well :-) I'd be grateful > for a > very simple explanation. > > I assumed that the multiple attributes was so that if (say) > > <!ATTLIST FOO BAR CDATA "BAZ"> > > occurs in the external DTD and > > <!ATTLIST FOO BAR CDATA "XYZZY"> > > occurs in the internal subset > then this is now legal whereas it wasn't before. But what is now the > default > value of BAR? I assumed it was the later declaration ("XYZZY"). > Please > disabuse me if this is wrong. [I assume that > > <FOO BAR="abc" BAR="xyz"> > > is illegal, still. If not we have some software to rewrite.] > > P. > > > > > > > -----Original Message----- > > > From: Richard Light [SMTP:richard@l...] > > > Sent: Thursday, June 12, 1997 1:19 AM > > > To: xml-dev@i... > > > Subject: Re: Repeating attribute specifications > > > > > > In message <3.0.32.19970611161725.00b540ac@p...>, > Tim > > > Bray <tbray@t...> writes > > > >>Is there anything in the XML spec which corresponds to the SGML > > > >>stricture that "there can only be one attribute specification > for > > > each > > > >>attribute definition", i.e. that you can't have repeated > attribute > > > >>specifications within a single start-tag? > > > > > > > >No. This is legal in XML. And in SGML, with the recent TC. -T. > > > > > > The other answer I got to this question quoted the XML Lang spec > > > (section 3.1): > > > > > > "Validity constraint - Unique Att Spec: > > > No attribute may appear more than once in the same start-tag." > > > > > > This seemed to deal with the issue pretty conclusively: I had just > > > failed to look under "start-tags" while thinking about attributes > ;-) > > > > > > Is this all about to change with the 30 June update? > > > > > > Richard Light > > > SGML and Museum Information Consultancy > > > richard@l... > > > 3 Midfields Walk > > > Burgess Hill > > > West Sussex RH15 8JA > > > U.K. > > > tel. (44) 1444 232067 > > > > > > xml-dev: A list for W3C XML Developers > > > Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ > > > To unsubscribe, send to majordomo@i... the following message; > > > unsubscribe xml-dev > > > List coordinator, Henry Rzepa (rzepa@i...) > > > > xml-dev: A list for W3C XML Developers > > Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ > > To unsubscribe, send to majordomo@i... the following message; > > unsubscribe xml-dev > > List coordinator, Henry Rzepa (rzepa@i...) > > > > > > -- > Peter Murray-Rust, domestic net connection > Virtual School of Molecular Sciences > http://www.vsms.nottingham.ac.uk/ > > xml-dev: A list for W3C XML Developers > Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ > To unsubscribe, send to majordomo@i... the following message; > unsubscribe xml-dev > List coordinator, Henry Rzepa (rzepa@i...) xml-dev: A list for W3C XML Developers Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ To unsubscribe, send to majordomo@i... the following message; unsubscribe xml-dev List coordinator, Henry Rzepa (rzepa@i...)
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