Epigrams are expected in the "epigrams" subdirectory of the base
directory while tag expressions are expected to be stored below
"expressions".
+
+ If the option is not given, and the per-user epigram directory does
+ not exist, the system-wide default DATADIR() is tried. There is no
+ such fallback for tag expressions, though.
[/help]
[subcommand compgen]