•The input data is first loaded to SUBFILE and after doing interactive data validation they are added to physical file. The new keywords required include SFLNXTCHG, SFLINZ, and SFLRNA.

•SFLNXTCHG - It ENABLES a READC instruction to process all of the subfile records as CHANGED. To enable READC on the same record, which was already read by READC, SET on SFLNZTCHG and update subfile.

•SFLINZ - Initializes alphanumeric fields to blanks and numeric fields to zeros. When input records are added to a subfile initialized by an SFLINZ OPERATION, they are flagged as changed.

•SFLRNA - Initializes the subfile with no active records.

•The input data is first loaded to subfile and after doing interactive data validation they are added to physical file. The new keywords required include SFLNXTCHG, SFLINZ, and SFLRNA.

•SFLNXTCHG - It enables a READC instruction to process all of the subfile records as changed. To enable READC on the same record, which was already read by READC, set on SFLNZTCHG and update subfile.

•SFLINZ - Initializes alphanumeric fields to blanks and numeric fields to zeros. When input records are added to a subfile initialized by an SFLINZ operation, they are flagged as changed.

•SFLRNA - Initializes the subfile with no active records.