I love XML, and in particular XPATH. I would recommend INI files for very simple data, but I like XML for pretty much anything otherwise.
Don’t google for how to do this with BigFix… that will lead you down the wrong path. You need to figure out how to do this with XPATH, and then use the XPATH statement you come up with in the xpaths or selects inspectors.
I haven’t test this at all, but this should be very close:
node values whose(it as string as trimmed string as lowercase ends with ".com") of selects "ServerSettings/CommConf/ServerList/ServerPriorityBlock[@Name='Priority1']/Server/@Address" of xml document of file "C:\data.xml"
This is a great site to test XPATH: http://codebeautify.org/Xpath-Tester