Visual programming in the interface construction

The Interface Construction Set (InterCONS) is a visual language and environment. It consists of a data-flow language, an editor for building and testing data-flow programs and making presentation views of the programs, libraries for holding completed programs, and a presentation system for interacting with finished programs and sequences of programs. The author describes the data-flow language and its primitives for arithmetic, logic, interactive control, path control, visual output, and program control. The execution model is also described. InterCONS is useful for experimenting with interactive controls and building models of interactive applications