There is a setting in the server in your ININ.IWP.Marquee.WinService.exe.Config file that can spit out sample values. It places the output files in the Marquee folder on the server.
The setting is found under the <appSettings> node and looks like this:
<add key="buildSampleXmlOnStart" value="all" />
Aside from that, whenever I want to verify what is being parsed I'll usually put the following in tags so I can verify what it looks like in real-time.
<xsl:copy-of select="." />
Hope that helps.
EDIT:
I was incorrect with my former post, the correct value for the buildSampleXmlOnStart is not "true", but one of "none", "all", or "workgroup_agent_status".
See here for more info:
http://help.inin.com/cic/mergedprojects/wh_mar/desktop/about_config_files.htm