I get an error when trying to specify an input xml document via an http get request.  The nsxlt command line and error message follow.  I have changed the userid and pw in the -xmlc and -xsltc credentials requests.  I can find no documentation on the -xmlns:http parameter, and haven't found any variation that works (by trial and error).  Any and help much appreciated.

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C:\nxslt2 -o xmlout.xml -xmlc userid:pw@site -xslc userid:pw@site "http://xxx.xxx.net/sites/SharePointTeam/taxonomy/_vti_bin/owssvr.dll?Cmd=Display&List={1E76B939-41BA-4FBB-8418-78F79B552CCD}&XMLDATA=TRUE" s:\topic_library\glossary-from-sharepoint.xsl

.NET 2.0 XSLT command line utility, version 2.3.0
(c) 2004-2006 Oleg Tkachenko, http://www.xmllab.net
Running under .NET 2.0.50727.832

...

An error occurred while parsing command line.

XmlLab.nxslt.NXsltCommandLineParsingException: Prefix 'http' cannot be resolved.  Use xmlns:http='...' to bind 'http' to
 a URI.
   at XmlLab.nxslt.NXsltArgumentsParser.ResolveParameters(NXsltOptions options)
   at XmlLab.nxslt.NXsltArgumentsParser.ParseArguments(String[] args, NXsltOptions options)
   at XmlLab.nxslt.NXsltMain.Main(String[] args)

C:\