Structure of System tables views

Name                                                              Null?              Type
 -----------------------------------------                         --------              ----------------------------
 OWNER                                                      NOT NULL      VARCHAR2(30)
 VIEW_NAME                                            NOT NULL      VARCHAR2(30)
 TEXT_LENGTH                                                                  NUMBER
 TEXT                                                                                     LONG
 TYPE_TEXT_LENGTH                                                      NUMBER
 TYPE_TEXT                                                                        VARCHAR2(4000)
 OID_TEXT_LENGTH                                                         NUMBER
 OID_TEXT                                                                           VARCHAR2(4000)
 VIEW_TYPE_OWNER                                                        VARCHAR2(30)
 VIEW_TYPE                                                                        VARCHAR2(30)
 SUPERVIEW_NAME                                                          VARCHAR2(30)