[XML-SIG] getAttributeNS

[Jan Delgado]

hello,
i created  DOM trees with calls to 

a) dom = xml.dom.ext.reader.Sax2.FromXmlStream( sys.stdin, validate=1 )
b) dom = xml.dom.ext.reader.Sax2.FromXmlStream( sys.stdin, validate=0 )

when i try to access attributes i noticed a few problems:

1. getAttribute() does not find my attributes
2. for case a) i have to call getAttributeNS(None, "attrname")
3. for case b) i have to call getAttributeNS('', "attrname")

what is the problem here ? what is the correct way to get the
attributes ?

greetings 
	jan