When entering the rule, capture the value:
% &SAVE-BLANK-STATUS = &APS-BLANK-STATUS
When leaving the rule,
% IF &SAVE-BLANK-STATUS = "BLANK" % SET BLANK % ELSE-IF &SAVE-BLANK-STATUS = "NOBLANK" % SET NOBLANK
Sample generated values:
&APS-BLANK-STATUS = "BLANK" (following a % SET BLANK)
&APS-BLANK-STATUS = "NOBLANK" (following a % SET NOBLANK)
Comments: