GETS: a graphical environment for task specification

GETS is an interactive environment that uses graphic technologies and iconic images to support user task specifications. In this environment, problem-solving is based on the selection, specification and composition of tools that correspond to natural sets of ordered operations. The GETS environment is unique in that it: (1) provides an interactive, visual-based approach to user task specification; (2) encourages and supports true top-down task specification and refinement processes, and (3) enables one to specify parallel tasks in a natural and convenient manner. To program a given task with the GETS environment, one decomposes it into an ordered set of conceptually simple, high-level operations, and then combines (composes) a corresponding network of software tools that implements these operations. Execution of the specified network provides a task solution. Task specification within the GETS environment is supported through these major components: a network editor, a tools database and a network execution manner