Uche, I have it working now. Thanks for your help! Yours, JonTom JT Kittredge ITA Software, Inc. Cambridge, Massachusetts On 2005-06-13 at 09:33, Uche Ogbuji wrote: > On Mon, 2005-06-13 at 10:29 -0400, JonTom Kittredge wrote: > > Uche, Thanks for your response. My comments are below. > > > On 2005-06-09 at 06:26, Uche Ogbuji wrote: > > > On Wed, 2005-06-08 at 10:27 -0400, JonTom Kittredge wrote: > > > > I'm having trouble using PyXML to evaluate XPath expressions that > > > > include namespace references. > > > > > > > > Here is a sample Python snipped: > > > > > > > > #!/usr/bin/env pystart > > > > > > > > import sys > > > > import xml.dom.minidom > > > > > > > > from xml.xpath.Context import Context > > > > from xml.xpath import Evaluate > > > > from xml.xpath.NamespaceNode import NamespaceNode > > > > > > > > > > > > if __name__ == "__main__": > > > > sys.stderr.write("XPathTest: 18\n") > > > > > > > > inputDom = xml.dom.minidom.parse(open("xpathtest-input.xml")) > > > > > > > > sys.stderr.write("Node: %s\n" % (inputDom.documentElement)) > > > > outContext = Context(inputDom.documentElement) > > > > > > Where are you passing in the NS mapping here? Did I miss a PyXML XPath > > > update that defaults mappings to in-scope namespaces on the node passed > > > in? > > > > That's the nub of my question. How do I pass namespace mappings into > > Evaluate()? > > outContext = Context(inputDom.documentElement, processorNss={u'dbq': > DBQNS}) > > > The only thing I could see to try, from looking at the documentation, > > was to use the context argument. The Context object holds namespace > > objects, so I thought that that might be the way to pass in my > > definition. > > Yes, but you have to give it the namespace defs, as above. > > > As you can see from the output, the Context I get from the document > > node already has the "dbq" namespace defined (since it appears in the > > input), before I call Evaluate(). However, it apparently gets reset > > during the call to Evaluate(). > > That's what's confusing me. I'm not sure why it automatically has that > namespace at any point. Anyway, see if my suggestion helps. > > > -- > Uche Ogbuji Fourthought, Inc. > > > Use CSS to display XML, part 2 - > XML Output with 4Suite & Amara - > Use XSLT to prepare XML for import into OpenOffice Calc - > Schema standardization for top-down semantic transparency -