CIBlockCMLExport::GetPropertyXML_ID

function GetPropertyXML_ID($IBLOCK_ID, $NAME, $PROPERTY_ID, $XML_ID)
{
	if($XML_ID == '')
	{
		$XML_ID = $PROPERTY_ID;
		$obProperty = new CIBlockProperty;
		$rsProperty = $obProperty->GetList(array(), array("IBLOCK_ID"=>$IBLOCK_ID, "XML_ID"=>$XML_ID));
		while($rsProperty->Fetch())
		{
			$XML_ID = md5(uniqid(mt_rand(), true));
			$rsProperty = $obProperty->GetList(array(), array("IBLOCK_ID"=>$IBLOCK_ID, "XML_ID"=>$XML_ID));
		}
		$obProperty->Update($PROPERTY_ID, array("NAME"=>$NAME, "XML_ID" => $XML_ID));
	}
	return $XML_ID;
}