Combining Change And Constant Modes; Points To Note - Xerox 721P85530 Description

USING LOGICAL PROCESSING

Combining change and constant modes

Points to note

7-8
The CRITERIA tables may specify either change mode or constant
mode functions; there are no restrictions on their usage or
combination.
There are two special cases: when the record or block is too short to
include the field being tested and when the line being tested contains
no record, that is, it has been skipped. If the test specifies a constant
mode function, the CRITERIA fails.
Note: If the test specifies a change mode function, the CRITERIA
fails because no change has occurred, but the value for LAST option
of the CHANGE parameter is unchanged for comparison with the
next record. (See additional information under the "Criteria
parameter functions" section.)
A compiler error occurs if you attempt an AND test on two different
criteria which appear on two non-overlapping line ranges. For
example, a logic problem occurs with ROFFSET where line 3
contains Criteria 1 and Line 2 contains Criteria 2, that is, Criteria 1
and Criteria 2 are not equal to LAST.
Note the following when using the CRITERIA command:
When change mode CRITERIA commands are evaluated, a string
from the current line is compared with a string saved from the
corresponding part of a previous line.
•
If the comparison is not equal, the string from the current line
becomes the saved comparison string for subsequent lines and
the criteria is considered true.
•
If two records are overprinted on the same line but with different
data in the field defined by the CRITERIA command, the string
from the last overprint record becomes the saved comparison
string and the CHANGE CRITERIA is satisfied.
•
If the LINENUM parameter is used, lines within the specified
range are processed normally, and lines outside the range are
not evaluated. Thus, change mode comparison strings are not
saved from lines outside of a LINENUM range.
No print records (carriage control specifies no printing but only
skipping or spacing) are evaluated for logical processing in the
following manner:
•
If change mode is specified, no print records are evaluated.
•
If constant mode is specified, no print records are evaluated.
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