CIBlockCMLImport::CheckProperty

function CheckProperty($IBLOCK_ID, $code, $xml_name)
{
	$obProperty = new CIBlockProperty;
	$rsProperty = $obProperty->GetList(array(), array("IBLOCK_ID"=>$IBLOCK_ID, "XML_ID"=>$code));
	$dbProperty = $rsProperty->Fetch();
	if(!$dbProperty)
	{
		$arProperty = array(
			"IBLOCK_ID" => $IBLOCK_ID,
			"NAME" => is_array($xml_name)? $xml_name["NAME"]: $xml_name,
			"CODE" => $code,
			"XML_ID" => $code,
			"MULTIPLE" => "N",
			"PROPERTY_TYPE" => "S",
			"ACTIVE" => "Y",
		);
		if(is_array($xml_name))
		{
			foreach($xml_name as $name => $value)
				$arProperty[$name] = $value;
		}
		$ID = $obProperty->Add($arProperty);
		if(!$ID)
			return $obProperty->LAST_ERROR;
	}
	elseif (is_array($xml_name))
	{
		$update = array();
		foreach($xml_name as $name => $value)
		{
			if (($name != "NAME") && ($dbProperty[$name] != $value))
			{
				$update[$name] = $value;
			}
		}
		if ($update)
		{
			$obProperty->Update($dbProperty["ID"], $update);
		}
	}
	return true;
}