S550-0436-04
Begin Page (BPG) structured field
Begin Page (BPG) structured field
When ACIF processes an AFP data stream print file, it checks for an
FQN type X'01' triplet on every page. If the FQN triplet exists, ACIF uses
the value when it creates an FQN type X'87' triplet on the
corresponding Index Element (IEL) structured field in the index object file.
If one does not exist, ACIF creates one by using a rolling 8-byte
EBCDIC sequence number, which ensures uniquely named pages up to a
maximum of 99999999 pages within a print file. ACIF creates IEL structured fields
for pages only if INDEXOBJ=ALL is specified.
When ACIF processes a line data print file, it creates the BPG structured fields.
It assigns a rolling 8-byte EBCDIC sequence number to the token name
(for example, 00000001, where 1=X'F1'). The sequence number
begins with 00000001 and is incremented by 1 each time a group is
created. ACIF also creates an FQN type X'01' triplet by
using the same sequence number value, and uses this value in the appropriate
IEL structured field if INDEXOBJ=ALL is specified. A maximum of 99999999
groups can be supported before the counter wraps, which means that ACIF ensures
a maximum of 99999999 unique group names.
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