HELP-GROUP : MEXPRHELP-GROUP is a top-level command.
Give information about a group of TPS objects; specifically,
given the name of a category, a context, or a top level,
list the help messages for every object in that class.
If given a list of names, it will list the help messages
for all the objects that fall into the intersection of these
classes (e.g. HELP-GROUP (MEXPR REWRITING) will show all the
top-level commands in the context REWRITING).
NOTE: Remember that the name of a context is not necessarily
the name that prints on the screen; do HELP CONTEXT
to show their real names.
The command format for HELP-GROUP is:
The arguments have the following meaning:
KEYWORDS : TPS objects
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