Pathway/iTS SCREEN COBOL Reference Manual (G06.24+, H06.03+, Pathway/iTS 1.0+)

Data Division
Compaq NonStop™ Pathway/iTS SCREEN COBOL Reference Manual—426750-001
5-67
Clauses in Message Description Entry
The TCP generates pad data if a field has not been entered, but needs to be physically
stored (shadow field = 4 or 5). The TCP generates pad data so that the application does
not reference previously stored data.
The pad data generated for the target Working-Storage data item is blank spaces for a
nonnumeric item and zeros (binary if COMP, otherwise ASCII) for a numeric item.
The TCP considers a field to be not entered and generates pad data when:
•
The message specifies that a field is conditionally present and the condition is not
met so that the TCP finds the field to be absent
•
The message specifies that field delimiters are enabled and optionally that message
delimiters are enabled. The TCP finds:
°
Two consecutive delimiters—two field delimiters or a field delimiter followed
by a message delimiter
°
A field delimiter as the last character of the message and the associated field is
the last field of the message
The selected state only has effect during output processing on a field. The selected state
provides you with the capability to override PRESENT IF processing on a field.
Overriding PRESENT IF processing will be the exception rather than the common
course of action. However, there might be instances where you need to output a given
field even if the PRESENT IF processing shows the field to be absent.
The selected state can assume the value of 1 or 0.
•
Selected state = 1—The TCP unconditionally outputs the field. The field is output
regardless of the result of any conditionally present processing on the field caused
by the PRESENT IF clause.
•
Selected state = 0—The result of the PRESENT IF processing on the field is a factor
in the decision to output that field.
Table 5-10
shows the logical relationship between the FIELD STATUS shadow data
item and PRESENT IF processing.
Table 5-9. FIELD STATUS Clause Shadow Values
Shadow Values With
Selected State of 0
Shadow Values With
Selected State of 1
State Input Output Input Output
Entered 2 N.A. 3 N.A.
Generated and Stored 4 N.A. 5 N.A.
Entered and Stored 6 N.A. 7 N.A.
Selected N.A. 0 N.A. 1