This session parameter is used to reference an attribute control variable. An attribute control variable is defined with Format C (see Special Formats in the Programming Guide) and is used to
assign field attributes dynamically and/or
check the "modified" status of a field in conjunction with
an INPUT or
PROCESS PAGE
statement; see also Logical Condition Criteria,
MODIFIED Option -
Check wether Field Content has been Modified in the
Programming Guide.
| Possible settings | B, C, D, I, N, U, V |
Field representation attributes (see session parameter
AD).
|
|---|---|---|
P |
Field protection (see session parameter
AD).
|
|
BL, GR, NE, PI, RE, TU, YE |
Color (for an explanation of the color codes, see the session
parameter CD).
|
|
| Default setting | none | |
| Applicable statements: | Parameter may be specified at statement level and/or at element level. | |
| Applicable command: | none | |
DEFINE DATA LOCAL 1 #ATTR(C) 1 #A (N5) END-DEFINE ... MOVE (AD=I CD=RE) TO #ATTR INPUT #A (CV=#ATTR) ...
By specifying the MODIFIED
option of the IF statement, the attribute control
variable can be used to check whether the contents of a field has been modified
during the execution of an INPUT or
PROCESS PAGE
statement:
IF #ATTR MODIFIED ...
A single attribute control variable can be applied to several input
fields by specifying it once at statement level or multiple times at element
level, in which case the "modified" status indication is set if
any of the fields referencing the control variable has been modified. If the
CV parameter is specified both at statement level and at
field level and the attribute control variable for the individual field is
empty, the attribute control variable for the statement will be used for the
field.
The attribute control variable can be expanded up to three dimensions,
for example, CONTR(*), CONTR(*,*),
CONTR(*,*,*), depending on the rank of the corresponding
array.
