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David Megginson wrote:
>
> Clark C. Evans writes:
>
> > On Sun, 26 Dec 1999 uche.ogbuji@f... wrote:
> > >
> > > {"http://www.w3.org/1999/xhtml", "a", ""} ==
> > > {"http://www.w3.org/1999/xhtml", "a", "html"}.
> >
> > {"","a",""} != {"","a","html"}
>
> As I understood it, the suggestion was that
>
> {"", "a", ""} == {"", "a", "html"}
Actually I think the namespace spec defines
{ undeclared, "a", valid-prefix }
as "namespace-nonconformant", AKA some kind of error which they
neglected to describe well enough to support portable APIs.
Meaning that any application choosing to use such a "Name"
class (which IMHO is a fine notion) needs to treat this value
with care ... IEEE floating point math has a variety of sorts
of "NaN" values, perhaps useful models can be found there.
I'd suggest that most "==" tests against such a Name ought to
fail, and ordering tests should cause exceptions.
The issue came up on another namespace thread.
- Dave
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