[XML-SIG] [SOLVED] soapy hacking -- getAttributeNS

Uche Ogbuji uche.ogbuji@fourthought.com
Sat, 01 Mar 2003 16:42:48 -0700

> On Wednesday 26 February 2003 10:48 pm, Mark Bucciarelli wrote:
> > Stupid question ... what's the proper way to retrieve the value of the name
> > attribute using pnode.getAttributeNS()?
> Nope.  To get at an attribute without a namespace prefix, you must use 
> getAttribute, not getAttributeNS.

Noooooooooo!  :-)

Please do not mix up getAttribute and getAttributeNS.  If you use namespaces, 
stick to the latter.

Your problem, as I mentioned, was that you should have been using 
xml.dom.EMPTY_NAMESPACE, which is None, not ''.

> Another interesting thing I found is if an attribute does have a prefix, then 
> the xmlns declaration must be in a parent tag--it cannot be in the same tag 
> as the attribute.

Hmm?  Not true at all.

> So, there is no way to get the value of the name attribute from the following 
> xml:
> s = "<root><test xmlns:mb='http://123' mb:name='abc' /></root>"
> Maybe this isn't legal xml.

Course it is, and works just fine for me.  If you insist on using 4DOM:

>>> from xml.dom.ext.reader import Sax2
>>> reader = Sax2.Reader()
>>> doc = reader.fromString("<root><test xmlns:mb='http://123' mb:name='abc' />
>>> test_node = doc.documentElement.firstChild
>>> test_node.getAttributeNS(u'http://123', u'name')

BTW, using 4Suite's Domlette, which is *much* faster than 4DOM you would use:

>>> from Ft.Xml.Domlette import NonvalidatingReader
>>> doc = NonvalidatingReader.parseString("<root><test xmlns:mb='http://123' 
mb:name='abc' /></root>","file:bogus.xml")
>>> test_node = doc.documentElement.firstChild
>>> test_node.attributes[(u'http://123', u'name')].value

May I suggest my Python/XML articles?  They cover some of the issues you've 
run into:


There is also a lot of relevant stuff on my Akara site:


Uche Ogbuji                                    Fourthought, Inc.
http://uche.ogbuji.net    http://4Suite.org    http://fourthought.com
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XML class warfare - http://www.adtmag.com/article.asp?id=6965
See you at XML Web Services One - http://www.xmlconference.com/santaclara/