.rdf extension on non-RDF CVS log files?

In my search for RDF files, I've been finding a lot of things like this[1].
A View Source shows that they're HTML, typically with a giant pre element
listing files in them. Is the use of the .rdf file extension for these some
convention unrelated to Resource Description Framework, like the use of the
same extension on ReDIF[2] files?
 
thanks,
 
Bob DuCharme   www.snee.com/bob <http://www.snee.com/bob>        <bob@  
snee.com> weblog on linking-related topics: 
http://www.oreillynet.com/pub/au/1191
<http://www.oreillynet.com/pub/au/1191> 
 
[1]
http://cvs2.oeone.com/index.cgi/penzilla3/apps/appliancemanagement/content/c
ontents.rdf
<http://cvs2.oeone.com/index.cgi/penzilla3/apps/appliancemanagement/content/
contents.rdf> 
[2] http://ideas.repec.org/p/rpc/rdfdoc/redif.html
<http://ideas.repec.org/p/rpc/rdfdoc/redif.html>