Added: 04/05/01

A patch name consists of the characters "PH" (Patch HP-UX), followed by
a two-character type-identifier, followed by an underscore, followed by
a four or five-digit number.

The currently defined patch types are:

CO - COmmands & libraries
KL - KerneL
NE - NEtworking
SS - SubSystems

An example name of a Kernel patch name would be "PHKL_23507."

Kernel patches always require a system reboot, so that the newly updated
kernel can be loaded.  Many Networking patches (PHNE*) also make
modifications to the kernel, and hence require a reboot.

Note that the numerical portion of any given patch name is unique, among
ALL patches.  So there would never be a patch named "PHCO_23507", in
addition to a patch named "PHKL_23507."  This lends itself nicely to
grepping for a particular patch (ie - to see if "PHKL_23507" is
installed, one could use "swlist -l product | grep 23507"