Re: [xml] Newbie Help

[Bryan Christ <bryan christ hp com>]

I actually solved my problem.   None of the examples and tutorials mentioned using xmlXPathInit().  However, because I found a discussion somewhere about needing to call this function once in a multi-threaded application I included it in my code.  However, there was nothing (that I could find) that stated that the call had to be made outside of the "worker thread".  Since I only need to implement xml and xpath in this one thread, I was calling xmlXPathInit() in that thread.  Eventually, as a shot-in-the-dark, I moved it to the calling process, main(), and everything works now.  Perhaps I have just overlooked the documentation which details this behavior. 

On Fri, 2004-08-13 at 15:30, Stefan Kost wrote:
> Hi Bryan,
>
> do you use namespaces in your xml file. If so, that one needs to be registered
> first, before doing queries. In the future it is helpful to add a snipped of the
> XML files as well, when asking.
>
> Stefan
>
> Bryan Christ wrote:
> > Well that helps a bit, but the problem still remains that the list
> > shouldn't return empty.  Any thoughts?
> > 
> > On Mon, 2004-08-09 at 16:14, Daniel Veillard wrote:
> > 
> > 
> >>On Mon, Aug 09, 2004 at 03:44:47PM -0500, Bryan Christ wrote:
> >>
> >>>Supplying the leading / is one of the permutations of the _expression_
> >>>that I have already tried.  When I do this, I *do not* get the error
> >>>messages:
> >>>
> >>>xmlXPathNodeCollectAndTest xpath.c:1923 : nodelist and node are NULL
> >>>
> >>>However, xpath_object is still returned as NULL.  According to the
> >>>documentation, even if there are no matches, shouldn't I receive back a
> >>>valid pointer to an empty list?
> >>
> >>  No, you may get NULL for an empty Nodeset. It's an optimization 
> >>which made huge difference for XSLT performances (no need to allocate/
> >>deallocate empty lists all the time).
> >>
> >>Daniel
> > 
> > 
> > 
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