A quick test. Could be used with GRDDL like this:
<playlist version="0" xmlns = "http://xspf.org/ns/0/" xmlns:data-view="http://www.w3.org/2003/g/data-view#" data-view:transformation="http://libby.asemantics.org/2005/01/XSPF/XSPF.xsl"> .... </playlist>
Original file: XSPFtest.xml
XSLT:
XSPF.xsl
Resulting RDF: XSPF.rdf
examples taken from http://gonze.com/xspf/xspf-draft-8.html
Copyright (c) Asemantics S.R.L, 2005
