Control Data Corporation 3300 Reference Manual page 275

FIELD NAME
RF (record format)
BF (block format)
LRS (logical record
size)
MAX (maximum logical
record size)
TIS (trailer item size)
KFM (key field mode)
KFS (key field size)
Key Location
E-4
SIZE
3 bits
1
bit
2
characters
2
characters
2 characters
1
bit
5 bits
17 bits
DESCRIPTION
Denotes the type of file records:
00 Fixed length records
01
Key field contains total number
of characters
02
Key field contains the number of
occurrences of a fixed length
trailer item
03
Universal format
04
Record mark specified by RM
terminates each record
1
=
One logical record per block
o =
Logical records are blocked and each
block contains two word header which
specifies next block number (NBN) and
position of first available character in
block (POF
A C) .
Logical record size, in characters, of
fixed length record; size of fixed portion of
variable records with trailer items. Zero
if records vary by key field or record mark.
Maximum size in characters of variable
portion of logical records. For variable
records with trailers, this is size of trailer
item times maximum number of occurrences.
For all others this is maximum size of record
within file.
Trailer item size in characters if RF
=
02,
else zero.
Mode of key field address
o
Key field is within each record
1
Key field is outside record (not
in file)
Number of characters in key field.
Character position of key field relative
to
beginning of record if key field is within
record.
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