protected function addTermRelations($concept)
{
$subjectUri = $concept->getAttributeNodeNS('http://www.w3.org/1999/02/22-rdf-syntax-ns#', 'about');
if (!$subjectUri instanceof DOMAttr || !isset($this->terms[$subjectUri->nodeValue])) {
continue;
}
foreach ($this->xpath->query('./skos:related', $concept) as $related) {
$objectUri = $related->getAttributeNodeNS('http://www.w3.org/1999/02/22-rdf-syntax-ns#', 'resource');
if (!$objectUri instanceof DomAttr || !isset($this->terms[$objectUri->nodeValue])) {
continue;
}
// Don't duplicate relationship
foreach ($this->relations as $r) {
if ($r['subject'] == $objectUri->nodeValue && $r['object'] == $subjectUri->nodeValue || $r['subject'] == $subjectUri->nodeValue && $r['object'] == $objectUri->nodeValue) {
continue 2;
}
}
$relation = new QubitRelation();
$relation->typeId = QubitTerm::TERM_RELATION_ASSOCIATIVE_ID;
$relation->subject = $this->terms[$subjectUri->nodeValue];
$relation->object = $this->terms[$objectUri->nodeValue];
$relation->save();
$this->relations[] = array('subject' => $subjectUri->nodeValue, 'object' => $objectUri->nodeValue);
}
return $this;
}
