STARTBR and RESETBR request processing

STARTBR and RESETBR request processing are very similar, and are described together.

VSAM processing

1. A VSWA is created if STARTBR.
2. The user key is recorded in the VSWA for use in subsequent BROWSE processing.
3. A call is made to VSAM to point to the record, and to acquire shared control of the CI.

BDAM processing

1. An FIOA is obtained and initialized if STARTBR.
2. The initial key is saved in the FIOA, converting the key from character string format to binary format if necessary.
3. If deblocking is required, the deblocking indicator (DEBREC or DEBKEY) is saved in the FIOA.