|| $self->ut_enum('format', [ '', 'C' ] )
|| $self->ut_text('detail')
|| $self->ut_foreign_keyn('classnum', 'usage_class', 'classnum')
|| $self->ut_enum('format', [ '', 'C' ] )
|| $self->ut_text('detail')
|| $self->ut_foreign_keyn('classnum', 'usage_class', 'classnum')