[xml] RE: namespaces in XPath queries (bug?)

["Igor Zlatkovic" <izlatkovic daenet de>]

Hi there.

I am forwarding your message to the libxml2 mailing list. Chances are
that someone there knows the cure for you.

> I'm using the libxml 2.4.3 for Win32 (IA32) that You have compiled.
> [...]
> Error C:\php4-build\ports\source\libxml2-2.3.7\xpath.c:6565: 
> Undefined namespace prefix
> file://xform:caption
>                ^

Take a look at the location of the offending .c file in the error line
above. I started providing binaries as of version 2.4.0, so far I can
remember. More, I have never had my sources in
c:\php4-build\ports\source\. I don't know what you are running, but it
is nothing of my creation.

Ciao
Igor


> -----Original Message-----
> From: Krzysztof Jarecki [mailto:zenderx ipro pl]
> Sent: Thursday, October 04, 2001 6:57 PM
> To: Igor Zlatkovic
> Subject: namespaces in XPath queries (bug?)
>
>
> hi;)
> I'm using the libxml 2.4.3 for Win32 (IA32) that You have compiled.
> My development enviroment consists also from an apache 1.3.20 
> and php 4.0.6.
>  
> I have encountered a small problem using XPath and namespaces.
> I have the following (tested example) XML:
> <?xml version="1.0"?>
> <xform:xform xmlns:xform="www.xdom.pl/myxforms">
>   <xform:caption>Test</xform:caption>
> </xform:xform>
>  
> and I would like to issue a simple XPath query like:
> "//caption"
> and this gives an empty result...
>
> so I tried something like this:
> "//xform:caption"
>
> and I saw that libxml gives me the following error in 
> apache's error log:
>  
> Error C:\php4-build\ports\source\libxml2-2.3.7\xpath.c:6565: 
> Undefined namespace prefix
> file://xform:caption
>                ^
> xmlXPathEval: evaluation failed
> Entity: line 1: warning: Namespace prefix xform is not defined
> <xform:xform>
>            ^
> Entity: line 2: warning: Namespace prefix xform is not defined
>  
> When I've changed the xml to look like this:
> <?xml version="1.0"?>
> <xform:xform xmlns:xform="www.xdom.pl/myxforms">
>   <caption>Test</caption>
> </xform:xform>
>
> the query  "//caption" worked perfectly.
>
> I'm writing to You in order to maybe get some help...
> I don't know whether I do something wrong (maybe there's a 
> special namespace calling convention in XPath?) or 
> this is a bug in libxml...???
>
> Hope to hear from You:) 
> Any word will be appreciated ;)
>
> Chris Jarecki
>  
> Ipro Int.
> www.ipro.pl