A facility can be a hardware device, a protocol, or a module within the system software. See Table 1-1 . A severity level is a single digit from 0 to 7 that reflects the severity of the condition. The lower the number, the more serious the situation. Table 1-2 lists the severity levels.
All mnemonics are all uppercase character strings .
A description level text string describes the condition. The text string may contain detailed information about the event, including terminal port numbers, network addresses, or addresses that correspond to locations in the system memory address space. Table 1-3 describes how the variable fields are represented in the messages. SYS is the facility type. 5 is the severity level, indicating that it is a normal but significant condition.