View's Source Code ? ... Basic Qs

Folks

Wherefrom can the source code definition of a View be obtained?

If sys.dba_views, it's Field "TEXT" is a LONG datatype. How can it's contents 
be read?

Cheers & Thanks V much


SQL> desc sys.dba_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)




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