Re: XML::LibXML XPath fails to find xmlns:xml="http://www.w3.org/XML/1998/namespace"

Aristotle Pagaltzis wrote:
> * Emmanuel Rodriguez <[email protected]> [2008-12-29 11:00]:
>   
>> I think that this "bug" is a border line case as the prefix
>> 'xml' is  reserved in the XML specification.
>>     
>
> I don’t think that’s what you want either.
>
> Question: why do you care about this? You shouldn’t have to. If
> you care about it it must be either because you are using broken
> software (unfortunately we all have to deal with that all too
> often – in which case maybe we can suggest something) or because
> you are about to *write* broken software (in which case I’d
> prefer we get you to reconsider :-) ).
>   
Can it be a little bit of both? I'm writing GUI that allows one to 
execute XPath expressions and see their results. Kind of simplified 
version of 'xmllint --shell' but with nice colors. So I need to register 
the namespaces available and declared in the document in order to add 
them to the XPath context. Yes I'm writing the 'broken' software but I 
would like it to be able to handle all kinds of documents. Thus, if 
someone explicitly (re)declared the XML namespace I need to handle that 
case and register the namespaces declared.

I think that this particular 'bug' is not so important since no one is 
supposed to overload that namespace. So I could safely and transparently 
add it to the XPath context without any problems.

I just wanted to point out that XML::LibXML findnodes() returns 
different results than libxml2. I also wanted to have the opinion of 
others because I was a little bit perplexed on the purpose/usage of the 
XML namespace.

For the curious, you can take a look at the XPath GUI that I made here:
Google Code: http://code.google.com/p/xacobeo/
CPAN: http://search.cpan.org/perldoc?Xacobeo

Best regards,
Emmanuel
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