[SR-Users] xmlops & XPath question

Daniel-Constantin Mierla daniel at asipto.com
Sat May 3 10:37:02 CEST 2014

On 03/05/14 10:33, Alex Balashov wrote:
> On 05/03/2014 04:31 AM, Daniel-Constantin Mierla wrote:
>> This kind usage of xmlns in an xml doc is a hack done by SIMPLE WG
>> breaking XML standard, because any ns has to use a prefix for each
>> corresponding name. If you search on google, you will fine some
>> discussions on the web (iirc, Inaki was there as well) - libxml2 devs
>> said they don't want to break the xml standard to handle this case,
>> probably they didn't change the mind meanwhile.
>> Anyhow, set a prefix for the namespace via xml_ns parameter and then use
>> it in xpath
>> modparam("xmlops", "xml_ns", "di=urn:ietf:params:xml:ns:dialog-info")
>> $xml(u=>xpath:/di:dialog-info/di:dialog[1]/di:state/text())
>> Hope i remembered correctly, anyhow it is somewhere in this direction.
>> If not, search on mailing list archive, the situation popped up few
>> times around.
> Thanks Daniel. I was heading in this direction, too, before I got lazy 
> and just hacked out the xmlns attribute with {re.subst}. :-)
Probably would be good to add a module parameter to do this change 
internally, like replacing 'xmlns' with 'xmlnx' - iirc, there is a copy 
if xml doc in a local buffer and by sticking to same size, there is no 
overall size change, so just one char replacement.

This could come handy when needing just to read. If one needs to update 
the xml doc, then the above could break things when generating the new xml.


Daniel-Constantin Mierla

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