Rules for Assigning Record Identifying Indicators

When you assign record identifying indicators to records in a program described file, remember the following:

You can assign the same indicator to two or more different record types if the same operation is to be processed on all record types. To do this, you specify the record identifying indicator in positions 21 and 22, and specify the record identification codes for the various record types in an OR relationship.
You can associate a record identifying indicator with an AND relationship, but it must appear on the first line of the group. Record identifying indicators cannot be specified on AND lines.
An undefined record (a record in a program described file that was not described by a record identification code in positions 23 through 46) causes the program to halt.
A record identifying indicator can be specified as a record identifying indicator for another record type, as a field indicator, or as a resulting indicator. No diagnostic message is issued, but this use of indicators may cause erroneous results.

When you assign record identifying indicators to records in an externally described file, remember the following:

AND/OR relationships cannot be used with record format names; however, the same record identifying indicator can be assigned to more than one record.
The record format name, rather than the file name, must be specified in positions 7 through 16.

For an example of record identifying indicators, see Figure 1.

Figure 1. Examples of Record Identifying Indicators

*...1....+....2....+....3....+....4....+....5....+....6....+....7...
IFilename++SqNORiPos1+NCCPos2+NCCPos3+NCC................................
I........................Fmt+SPFrom+To+++DcField+++++++++L1M1FrPlMnZr....
 *
I*Record identifying indicator 01 is set on if the record read
I*contains an S in position 1 or an A in position 1.
IINPUT1    NS  01    1 CS
I         OR         1 CA
I                                  1   25  FLD1
 * Record identifying indicator 02 is set on if the record read
 * contains XYZA in positions 1 through 4.
I          NS  02    1 CX    2 CY    3 CZ
I         AND        4 CA
I                                  1   15  FLDA
I                                 16   20  FLDB
 * Record identifying indicator 95 is set on if any record read
 * does not meet the requirements for record identifying indicators
 * 01 or 02.
I          NS  95
*...1....+....2....+....3....+....4....+....5....+....6....+....7...
IRcdname+++....Ri........................................................
 *
 * For an externally described file, record identifying indicator 10
 * is set on if the ITMREC record is read and record identifying
 * indicator 20 is set on if the SLSREC or COMREC records are read.
IITMREC        10
ISLSREC        20
ICOMREC        20