A segment is a group of operations performed as a unit.
The operations table is a part of the segment definition along with information on time-series needed and parametric data for each operation.
In many cases a segment will contain the computations needed to compute flow at a specific point on a river, but can contain any group of operations.
A forecast group is a group of segments in a preassigned computational order.
A segment can only belong to one regular forecast group.
A carryover group is one or more regular forecast groups in a preassigned computational order.
To start an IFP session, the initial display allows the user to choose which forecast group to run.
A forecast group is a previously defined set of forecast points, ordered from upstream to downstream along a river.
The forecast group is chosen by pointing to and selecting the name with the mouse.
When selected, the name becomes highlighted by reversing the foreground and background colors (reverse video).
