* Michael Kay <> [2005-08-28 14:24]:
>
> > The problem with XPath 1.0 appears to be that:
> >
> > /a[b = 5]
> >
> > Returns all matches while..
> >
> > /a[b + 1 = 6]
> >
> > .. returns only the first match.
> >
> > The fix in XPath 2.0 appears to be to return an error for the
> > latter if there is more than one match.
> >
> > Why is it not possible to return all /a[b + 1 = 6] ?
>
> For that to work, b+1 would have to return a set of numbers, one for each b.
> What then would b+c return? We did consider (very early on) a suggestion
> that it should return the set
>
> for $b in b, $c in c return $b + $c
>
> but we decided this would quickly produce unmanageable results; and in any
> case it would be impossible to define it in a way that was backwards
> compatible.
Now I see. Thank you.
--
Alan Gutierrez -
- http://engrm.com/blogometer/index.html
- http://engrm.com/blogometer/rss.2.0.xml
