CIBlockCMLImport::GetPropertyByXML_ID

function GetPropertyByXML_ID($IBLOCK_ID, $XML_ID)
{
	$obProperty = new CIBlockProperty;
	$rsProperty = $obProperty->GetList(array(), array("IBLOCK_ID"=>$IBLOCK_ID, "XML_ID"=>$XML_ID));
	if($arProperty = $rsProperty->Fetch())
		return $arProperty["ID"];
	else
		return false;
}