Harvesting RDF triples from xlink

Following the note sent by Ron Daniel,
I implemented the triples harvesting from XLink files.

Though I can't distribute the code right now,
there is a running demo at

  http://lisiperso3.univ-lyon1.fr/cgi-bin/xlinkrdf.pl

  Pierre-Antoine Champin

--- Quid quid Latine dictum sit, altum viditur
    Whatever is said in Latin sounds important.