The formats of the records written to the associated data file are shown in the sections that follow.
In the fields described in each of the record types, a notation based on the assembler language data type is used:
No boundary alignments are implied by any data type, and you can change the implied lengths by using a length indicator (Ln). All integer data is in System/370 format; that is bit 0 is always the most significant bit, bit n is the least significant bit, and the byte ordering in the records is from most significant to the least significant. The bits within a byte are numbered from left to right starting from 0.
Offsets within each record are calculated from the beginning of the header section.
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