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[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Re: determining ID-ness in XML
 Having an xml:id attribute is a terrific idea which is the best solution to an otherwise nasty problem. Since "xml:id" is already reserved, there is no chance of conflicting with currently available software. I don't see much reason to need to update DTDs because if you already _have_ a DTD then you can define ID attributes. The problem exists for well formed but DTD-less XML documents for which one needs to use the raw XPointer #foo. Jonathan > >So, adding a new xmlid attribute has downsides either way:- you either need > >to update your DTDs or you need to update your xml processors. This is true > >even for those people and applications that have no interest in being able > >to address ID-less elements. > > > > Any time you add a new attribute, you have to update your DTDs. This is true of xml:id, xml:base, xml:space, and xml:lang. Nothing in this discussion changes that. Nothing is special about xml:id. > > However, we are not saying that every application has to use xml:id. Certainly not every application uses xml:space or xml:lang today, much less xml:base. If the XHTML folks don't want xml:id in their XHTML documents, they don't have to use it. They don't change their DTDs. In fact, they really don't need to change them because conformant XHTML documents already have a DTD, and do have ID type attributes. > > Remember, the reason we're having this discussion is because not all XML documents have DTDs. It is precisely those without DTDs where xml:id is needed, and these applications can start using xml:id immediately because they don't have a DTD to change! or even if they do, they don't require validity. > > -- > > +-----------------------+------------------------+-------------------+ > | Elliotte Rusty Harold | elharo@m... | Writer/Programmer | > +-----------------------+------------------------+-------------------+ > | The XML Bible, 2nd Edition (Hungry Minds, 2001) | > | http://www.ibiblio.org/xml/books/bible2/ | > | http://www.amazon.com/exec/obidos/ISBN=0764547607/cafeaulaitA/ | > +----------------------------------+---------------------------------+ > | Read Cafe au Lait for Java News: http://www.cafeaulait.org/ | > | Read Cafe con Leche for XML News: http://www.ibiblio.org/xml/ | > +----------------------------------+---------------------------------+ > > ----------------------------------------------------------------- > The xml-dev list is sponsored by XML.org <http://www.xml.org>, an > initiative of OASIS <http://www.oasis-open.org> > > The list archives are at http://lists.xml.org/archives/xml-dev/ > > To subscribe or unsubscribe from this elist use the subscription > manager: <http://lists.xml.org/ob/adm.pl> 
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