CWebDavBase::_get_etag

function _get_etag()
{
	$utag = '';
	if (isset($this->arParams['element_array']))
	{
		$utag = md5(
			$this->arParams['element_array']['ID'].
			$this->arParams['element_array']['NAME'].
			$this->arParams['element_array']['TIMESTAMP_X']);
	}
	return $utag;
}