anchor.diff:      ;
   
   tablespace_retention_clause
  -    : RETENTION (GUARANTEE|NOGUARANTEE)
  +    : RETENTION (GUARANTEE | NOGUARANTEE)
       ;
   
   datafile_specification
  
positive.code:     ;
  
  create_tablespace
      : CREATE (BIGFILE|SMALLFILE)? 
          ( permanent_tablespace_clause
          | temporary_tablespace_clause
          | undo_tablespace_clause
  
negative.code:     ;
  
  segment_management_clause
      : SEGMENT SPACE_KEYWORD MANAGEMENT (AUTO | MANUAL)
      ;
  
  flashback_mode_clause
      : FLASHBACK (ON | OFF)
      ;
  
  temporary_tablespace_clause
  