Specification and Output Descriptions are available via the Function Codes in the System Information section of the Table of Contents. By selecting it, you can view specs for the different kinds of function codes in the system.
Or in treeview:
DBDOC ©1996 - 2021 G. Michaels Consulting Ltd., all rights reserved. All other trademarks and registered trademarks are the property of their respective holders. Website source largely available under the terms of the AGPLv3.