Internally, the workspaces are numbered by the numbering convention wsn,
where n is 0, 1, 2 and so on. For example, the default four workspaces are
numbered internally ws0 through ws3.
The system-wide resource file to add/edit resources is:
/etc/dt/config/lang/sys.resources
(You may have to create this file.)
Use the "title" resource to change the name of a specified workspace:
Dtwm*wsn: <name_of_workspace>
where n is 0, 1, 2, 3 and so on.
For example, the following resources set the default four workspaces to the
specified names:
Dtwm*ws0*title: Anna
Dtwm*ws1*title: Don
Dtwm*ws2*title: Julia
Dtwm*ws3*title: Patti
For individual users, the above resources can be added in the $HOME/.Xdefaults
file.