Hi again,

I just had a look at XPathTester. Looks like it is not
capable of finding out if two different queries are equivalent
or not, no matter what XML file they operate on.

-Al

On Oct 7, 5:00 am, Peter Flynn <peter.n...@m.silmaril.ie> wrote:
> Altu wrote:
> > Hi Joe,
>
> >> Depends on the predicate. If p2 or p3 tests position() or last(), _NO_
> >> -- the latter form would test position in the original set, while the
> >> former would test position in the set that has gotten past the
> >> preceeding filter(s).
>
> > p1, p2, and p3 are simple paths that only have ., /, //, and * like
>
> >  ./a/b//c/d//*
>
> >  or
>
> >  //a/b//c//*
>
> >> In these examples: no, since an absolute XPath by definition ignores its
> >> context and since if it fails in any of these the result is that we find
> >> no nodes. (Though for performance reasons in typical processors, you
> >> will probably want to test it earlier rather than later).
> >> In more complicated XPaths, maybe.
>
> > Other than performance difference, if my predicates are also simple
> > predicates like the case above, so I think they all return the same
> > result, is this correct?
>
> At this stage, why not download a copy of XPathTester and try it for
> yourself?
>
> ///Peter