RDF/XML definition

<?xml version="1.0" encoding="iso-8859-15" ?>
<rdf:RDF  xmlns="http://localhost/eWAN/grammar/grammar.php#" 
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" \
    xml:base="http://localhost/" xml:lang="fr">
...
write a "Topology"
...
</rdf:RDF>