<xsl:stylesheet version="0.1" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:variable name="base_RDF_URI" select="'helm:rdf:www.cs.unibo.it/helm/rdf/forward//'"/>
<xsl:stylesheet version="0.1" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:variable name="base_RDF_URI" select="'helm:rdf:www.cs.unibo.it/helm/rdf/forward//'"/>