Joined: 23 Nov 2006 Posts: 19270 Location: Inside the Matrix
At the top of the page is a link to "IBM Manuals". In the "Tools & Data Access methods" part of the manuals, there is the CLIST Language Reference and the REXX Language Reference. as well as others.
If you need to work on some old clist code, the clist material would be good to become familiar with but if you plan on doing new things, i'd suggest learning more about rexx as more rexx is beinb built these days.
If you find something that is not clear, post what you found and your question about it. Someone will be able to clarify.