/**
* @param string $term
* @param string $scheme
*/
function setCategory($term, $scheme = null)
{
$this->_category = new BaseElement('category', '', array('term' => $term));
if ($scheme != null) {
$this->_category->addAttribute('scheme', $scheme);
} else {
$this->_category->addAttribute('scheme', 'http://base.google.com/categories/itemtypes');
}
}
