Determing element namespace prefix

Akarsha krishna wrote:
> Hi,
> 
> I had sent the message forwarded below to the list a
few days ago. I am
> looking for a way to obtain namespace prefixes in
element names.
> 
> Any help in this matter would be greatly appreciated.
> 
> Thanks,
> Aki
> 
> ---------- Forwarded message ----------
> From: Akarsha krishna <akikrishnagmail.com>
> Date: Jan 2, 2007 3:41 PM
> Subject: Determing element namespace prefix
> To: xmlgnome.org
> 
> Hi,
> 
> Is there a straightforward way to determine if an
element has a namespace
> prefix? For the following element:
> 
> <myns:Elem> some data </myns:Elem>
> 
> I would like to obtain the string
"myns:Elem". xmlNode.name simply returns
> "Elem" and I can't find an obvious way to get
to the "myns" part as well.
> 
> Thanks,
> Aki


Hi Aki,

I think what you want is xmlNode.ns->prefix.

I access namespaces on attributes, and I get to them as 
xmlNode.properties->ns->prefix.

My code checks that both the ns pointer and the
ns->prefix pointer are 
non-NULL before comparing the prefix string. I don't
remember if that's 
just paranoia or if I discovered cases where NS could be
non-NULL while 
ns->prefix was NULL.

- Rush
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On Sat, Jan 06, 2007 at 12:04:59AM -0800, Akarsha krishna
wrote:
> Hi Rush. Thanks for the response.
> 
> I had tried xmlNode.properties->ns->prefix
earlier, but it returns a valid
> prefix string even for elements/attributes whose names
aren't explicitly
> qualified with a namespace prefix. I'd like to detect
the difference between
> the following two element definitions:
> 
> <SomeTopLevelElement
xmlns:SomePrefix="bla">
> <MyElement> Some data </MyElement>
> </SomeTopLevelElement>
> 
> VS
> 
> <SomeTopLevelElement
xmlns:SomePrefix="bla">
> <SomePrefix:MyElement> Some data
</SomePrefix:MyElement>
> </SomeTopLevelElement>

  In the first case the namespace for MyElement is NULL at
the C level
(assuming your example is the complete document, for a
fragment a default
namespace may change this).

Daniel


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