public function IsReservedKey( $sKey )
	{
		$bRet	= false;

		if ( CLib::IsExistingString( $sKey, true ) )
		{
			$sKey	= strtolower( trim( $sKey ) );
			$bRet	= in_array( $sKey, self::ARR_RESERVED_KEYS );
		}

		return $bRet;
	}