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Re: Namespace question: Do attributes inherit the element's namespace?

  • From: james anderson <James.Anderson@m...>
  • To: Tim Bray <tbray@t...>
  • Date: Fri, 07 Jan 2000 11:19:55 +0100

Re: Namespace question:  Do attributes inherit the element's  namespace?
ie., Mr Waldin's conclusion is correct, and the REC actually requires
application recognize that a conforming parser may well distinguish between
the two encodings and the application must act as if the standard is option #2.

Ray Waldin wrote:
> Tim Bray wrote:
> > So... let's try again.  Consider these two
> >
> >    <html:a href="foo">
> >    <html:a html:href="foo">
> >
> > The namespace spec could have said one of three things:
> >
> > 1. These must always be treated as identical
> > 2. These must always be treated as different
> > 3. Applications can make up their minds
> >
> > The then-Working Group eventually went for #3. ...
> How can #3 be an option at the application level if #2 isn't enforced at
> the parser level?  Will parsers allow switching between these universes
> at parse time?

Tim Bray responded:
> At 04:48 PM 1/6/00 -0800, Ray Waldin wrote:
> >  <html:a href="foo" html:href="bar"/>
> >
> >This element must be considered well-formed from the standpoint of XML
> >1.0 + Namespaces in order to allow #3 at the application level, no?  And
> >furthermore, applications wanting to live in #1 have to do extra work
> >for each and every attribute to ensure that documents in #3 are in the
> >subset that is universe #1.  Yikes!
> That's correct.  Apps can't rely on a generic XML or namespace processor
> to raise an error on this.  If they want to do so, they have to do the
> work themselves.  But the alternative - never allowing this to happen -
> seemed even more unattractive. -Tim

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