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How can i use Rete Algorithm in java?
Do i need to write my own algorithm implementation?
Or is there already implemented library available?
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The Rete algorithm is an example of an algorithm that matches production rules. The Rete algorithm uses a knowledge base to check production rules and provide outcomes accordingly. It uses a complex node system to return results. Tools such as joins determine the algorithm's behavior in terms of analysis.
The Rete algorithm is widely used to implement matching functionality within pattern-matching engines that exploit a match-resolve-act cycle to support forward chaining and inferencing.
The Rete network is constructed when you compile a rules project — only once when you start that service (or class for simpler designs) — and then shared across all invocations. The discrimination tree is the first part of the Rete network.
The Rete algorithm is implemented by building a network of nodes, each of which represents one or more tests found on a rule LHS. Facts that are being added to or removed from the knowledge base are processed by this network of nodes. At the bottom of the network are nodes representing individual rules.
So this is a pretty old question, but ranks highly if you're googling for Rete Implementations, so I'll leave some info here.
The wikipedia entry is pretty good and here is a paper about Rete/UL which is according to Doorenbos more efficient than ReteII Doorenbos, 1995.
Some Implementations include:
Its a really useful algorithm if you need to make decisions based on patterns of facts, and as a bonus, you'll have to learn some cool things about graphs and pattern matching.
Hope this is helpful!
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