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BLACKBOARD ARCHITECTURES (Blackboard Architecture (The black board…
BLACKBOARD ARCHITECTURES
Blackboard Architecture
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The particular reasoning method used any instant of time is determined dynamically based on what was last discovered.
In blackboard architecture, contributors are a set of knowledge sources that are knowledgeable about some aspect of the problem.
The blackboard problem-solving scheme has no predefined priority schedule determining how and when the individual knowledge sources are allowed access to the blackboard.
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AGE Components
The Blackboard
Was designed to provide means of communicating between the various knowledge sources in the form of hierarchical data structure.
Use a flexible knowledge hierarchy that could range from being flat to very complex.
The Knowledge Source
The knowledge source was designed to be separated and distinct
The knowledge sources were represented in a rule format.
Each knowledge sources has its own properties such as preconditions,specific region of applicability, strategy for executing the rules.
The Control Mechanism
Structured to allow user to specify how knowledge sources were invoked and how items on the blackboard were selected as a focus attention
The control components that needed to be specified included the input of the data, selection of the focus attention, selection of the appropriate knowledge sources, the application of the knowledge sources and conditions for terminating the system.
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Advantages of Blackboard
Suitable for diversity of problems
Data abstraction
Postponement of decisions
Loosely coupling of knowledge and its use
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