CLIM provides these command tables:
Summary: The "global" command table from which all command tables inherit.
Summary: A command table reserved for user-defined commands.
Summary: When you use an accept-values pane in a define-application-frame , you must inherit from this command table.
It is recommended that an application's command table inherit from user-command-table . user-command-table inherits from global-command-table . If your application uses an :accept-values pane, then its command table must inherit from the accept-values-pane command table in order for it to work properly.
Common Lisp Interface Manager 2.0 User's Guide - 3 Mar 2015