function toXML(&$writer)
{
$writer->xmlStartTag('Classification', array('Purpose' => $this->getPurpose() ? $this->getPurpose() : 'Idea'));
// Taxon Path
$taxs = $this->getTaxonPathIds();
foreach ($taxs as $id) {
$tax =& $this->getTaxonPath($id);
$tax->toXML($writer);
}
if (!count($taxs)) {
include_once 'Services/MetaData/classes/class.ilMDTaxonPath.php';
$tax = new ilMDTaxonPath($this->getRBACId(), $this->getObjId());
$tax->toXML($writer);
}
// Description
$writer->xmlElement('Description', array('Language' => $this->getDescriptionLanguageCode() ? $this->getDescriptionLanguageCode() : 'en'), $this->getDescription());
// Keyword
$keys = $this->getKeywordIds();
foreach ($keys as $id) {
$key =& $this->getKeyword($id);
$key->toXML($writer);
}
if (!count($keys)) {
include_once 'Services/MetaData/classes/class.ilMDKeyword.php';
$key = new ilMDKeyword($this->getRBACId(), $this->getObjId());
$key->toXML($writer);
}
$writer->xmlEndTag('Classification');
}
