Description: The top-level URL of the system. If it does not exist the value is an empty string. The URL format is implementation dependent and can have keywords embedded that are preceeded by a percent sign (eg, %USER). The following are the defined keywords that will be recognized and replaced with data during a launch: USER - replace with username PASSWORD - replace with password GLOBALID - replace with globalid SERIALNO - replace with serial number A management application will read this object from the MIB, provide values for any of the keywords listed above that are present in the string, and then use the URL to invoke or launch the program referenced.