The function list-classes
collects all the classes below root-class (which defaults to standard-db-object) that are connected to the given database specified by database, and which satisfy the test function. The default for the test argument is cl:identity
.
By default, list-classes
returns a list of all the classes connected to the default database, *default-database*.
LispWorks User Guide and Reference Manual - 20 Sep 2017