is#command_based_interface__commandbasedinterface
  supertype:  non-graphical_user_interface
  subtype:  network-accessible_command_based_interface
     subtype:  OKBC_interface
     subtype:  CGI-accessible_command_based_interface
  subtype:  direct_command_based_interface__shell
     subtype:  sh
     subtype:  ksh
     subtype:  csh

No statement uses or specializes command_based_interface; click here to add one.