Drools 5.3.0.CR1 released (Expert, Fusion, Planner, Guvnor)
New and Noteworthy: http://docs.jboss.org/drools/release/5.3.0.CR1/droolsjbpm-introduction-docs/html_single/index.html#d0e47
Download and info: http://blog.athico.com/2011/09/drools-530cr1-released-including-expert.html

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With kind regards,
Geoffrey De Smet