The task code is used in the AUDIT.TREE record field. It specifies the task that created the data. (Along with the site identifier and date, this information makes up the history trace for a file.) Task codes are integer values at least 32 bits long.
The codes may be assigned on any basis desired, although it is recommended that a particular system or format be devised to maintain order. One can assign a code for each general task, or for each program, or even for each set of run-time parameters for each program. How much information is required to distinguish one task from another is left to the dataset creator to decide.