The application program must be adapted for the use of extended database key values even in areas where it is not immediately obvious that such database key values are being used. This includes the following cases:
The application program gets database key values from user data.
The application program transfers database key values between two or more record types.
The application program uses database key values across databases. In this case, changes may be required in the databases involved (see "Criteria for conversion") in addition to those needed in the application program.
The application program manages set connections via database key values.
The application program uses database key values
to directly influence the management of records of this record type
to remember links and dependencies.
The application program uses a COBOL item that is not of type USAGE IS DATABASE-KEY or
USAGE IS DATABASE-KEY-LONG in order to temporarily store or process database key values.The application program uses a COBOL item in order to temporarily store or process database key values of different record types.
The application program transfers database key values to database items that are not of type DATABASE-KEY or DATABASE-KEY-LONG. In this case, adaptations may be required in the database involved (see "Criteria for conversion") in addition to the changes in the application program.