Is a subperiod

A relative time reference in @if statements.

The opening period is the aggregate of the closing and deal periods.


  • True—if the period is subperiod with zero days

  • False—if not


If 2007 is in years and 2008 is comprised of two subperiods, one of 365 days and another of zero days, this formula:

@if(@issub, 1, 2)

returns 2 for 2007, and, for 2008, 1 for the 365 day and 1 in the restatement or zero-day period.

If this function was built using Using User-Defined Accounts, the 2008 aggregate period returns a 2.