Contains the time to purge SLP Service objects which have not updated their lifetimes.
When a SLP Service object lets its lifetime expire, the SLP Directory Agent removes it from the list service objects used to answer service queries, but the service object is not removed from the master list. When the purge hour arrives, the SLP Directory Agent removes the service objects with expired lifetimes from the master list.
For help in understanding the attribute definition template, see Reading NDS Attribute Type Definitions.