Design patterns·The shape of the whole application
several independent components read from and write to one shared workspace, and no one of them owns the answer.
Blackboard pattern
Also calledblackboard, shared workspace architecture
An architecture for problems with no deterministic solution path: independent knowledge sources contribute partial results to a shared structure until a solution emerges, coordinated by a control component. Speech recognition and sensor fusion are the traditional cases. It is in this corpus because it appears in architecture exams and reading lists, and because its shared mutable centre is a useful contrast with pipes and filters.