Understanding process jobTpe

I have a client running cache on an AIX platform. I put together a objectscript to allow for the viewing the processes running against the database using a select from SYS.Process. One of the values I want in the view of the processes information is Jobtype but I want to convert it from the numeric value to a string value. In the Intersystems documentation there is a reference to an include file $syPidTab.inc that should include macros that make this translation. I have not been able to track down this include file. Is there a document that describes the name of the process associated with each of the job types ( numeric value to job name)?