Convert XML to RDF

How can I go about converting an XML document into an RDF document using XSLT? I need a conversion which outputs another file with an *.rdf file extension. The closest I could find was for transforming XML to XHTML.

I need to do this for a college software project I'm working on, so any help is greatly appreciated. Thanks.

PS-> Sorry if this is the wrong place to post, but there does not appear to be an XML-related board.