public function add_row($row, $key_subject = null, $normalize = false)
{
if (!empty($key_subject) && array_key_exists($key_subject, $row)) {
$subject = $row[$key_subject];
}
if (!RdfStream::is_uri($subject)) {
$subject = $this->create_subject();
}
foreach ($row as $property => $value) {
if (!empty($key_subject) && strcmp($property, $key_subject) === 0) {
continue;
}
if ($normalize) {
$property = RdfStream::normalize_localname($property);
}
if ($this->output === RdfStream::RDF_SYNTAX_NT && !strpos($property, ":")) {
$property = $this->propns . $property;
}
if (is_array($value)) {
//a list of values
foreach ($value as $object) {
$this->add_triple($subject, $property, $object);
}
} else {
$object = $value;
$this->add_triple($subject, $property, $object);
}
}
}
