A relative reference in @if statements.
Forecast periods are determined by the historical/forecast boundary set in Defining, Deleting, and Displaying Time Periods.
True—if the period is a forecasted period
False—if not
If a model contains 6 years starting in 2006, with the first year historical, then the remaining years, 2007–2011, are forecast. This formula:
@if(@isfore, 1, 2)