is#non-graphical_user_interface
  exclusion:  is#graphical_user_interface
  supertype:  is#user_interface
  subtype:  is#procedure_call_interface
     subtype:  is#network-accessible_procedure_call_interface
        subtype:  is#RPC_interface__Remote_Procedure_Call_interface__remoteprocedurecallinterface
     subtype:  is#API__application_programming_interface__applicationprogramminginterface
  subtype:  is#command_based_interface__commandbasedinterface
     subtype:  is#network-accessible_command_based_interface
        subtype:  is#OKBC_interface
        subtype:  is#CGI-accessible_command_based_interface
     subtype:  is#direct_command_based_interface__shell
        subtype:  is#sh
        subtype:  is#ksh
        subtype:  is#csh

No statement uses or specializes is#non-graphical_user_interface; click here to add one.