Here is an excellent article, introduction reproduced below, from our very own mailing list mentor Geoffrey Wiseman:http://www.infoq.com/articles/Rule-Engines For many developers, rule engines are buzzwords, or black boxes on an architectural diagram: something to be feared or admired from afar, but not understood. Coming to terms with this, is one of the catch-22s of technology: It’sRead more →
Some times workflow is nothing but a decision tree, a series of questions with yes/no answers to determine a final answer. This can be modelled far better with a Production Rule System, and is already on the Drools road map. For the other situations we can use a specialised implementation of Agenda Groups to modelRead more →
Drools is a Rule Engine but it is more correctly classified as a Production Rule System. The term “Production Rule” originates from formal grammer – where it is described as “an abstract structure that describes a formal language precisely, i.e., a set of rules that mathematically delineates a (usually infinite) set of finite-length strings overRead more →
