Drools. Drools is a business rule management system (BRMS) with a forward chaining inference based rules engine, more correctly known as a production rule system, using an enhanced implementation of the Rete algorithm.
Drools supports the JSR-94 standard for its business rule engine and enterprise framework for the construction, maintenance, and enforcement of business policies in an organization, application, or service. JBoss Enterprise BRMS[edit] JBoss Enterprise BRMS is a business rule management system and reasoning engine for business policy and rules development, access, and change management.[1] JBoss Enterprise BRMS is a productized version of Drools with enterprise-level support available.
JBoss Rules is also a productized version of Drools, but JBoss Enterprise BRMS is the flagship product.[2] Components of the enterprise version:[3] Drools and Guvnor are JBoss Community open source projects. Components of the JBoss Community version:[6] Example[edit] Related systems[edit] CLIPS. CLIPS is a public domain software tool for building expert systems.
The name is an acronym for "C Language Integrated Production System. " The syntax and name was inspired by Charles Forgy's OPS ("Official Production System," although there was nothing really official about it). The first versions of CLIPS were developed starting in 1985 at NASA-Johnson Space Center (as an alternative for existing system ART*Inference) until the mid-1990s when the development group's responsibilities ceased to focus on expert system technology. The original name of the project was NASA's AI Language (NAIL). Facts and rules[edit] Like other expert system languages, CLIPS deals with rules and facts. In CLIPS, salience allows a user to assign priority (or weight) to a rule. Descendants[edit] Documentation[edit] CLIPS contains an extensive set of readable documentation and the following books are available: See also[edit] References[edit] External links[edit]
Jess (programming language) Rather than a procedural paradigm, where a single program has a loop that is activated only one time, the declarative paradigm used by Jess continuously applies a collection of rules to a collection of facts by a process called pattern matching.
Rules can modify the collection of facts, or they can execute any Java code. The Jess rules engine utilizes the Rete algorithm,[1] and can be utilized to create: While CLIPS is licensed as open source, Jess is not open source. JESS is free for educational and government use but a license is required to use JESS for commercial systems.
Code examples: ; is a comment (bind ? Sample code: CLIPS: public domain software tool for building expert systems.ILOG rules: a business rule management system.JBoss Drools: a business rule management system (BRMS).Prolog: a general purpose logic programming language.OpenL Tablets: business centric rules and BRMS.DTRules: a decision table based, open-sourced rule engine for Java. Friedman-Hill, Ernest (2003). JBoss application server. WildFly is free and open-source software, subject to the requirements of the GNU Lesser General Public License (LGPL), version 2.1.
The renaming to WildFly was done to reduce confusion. The renaming only affects the JBoss Application Server project. The JBoss Community or the Red Hat JBoss product line (with JBoss Enterprise Application Platform) all retain their names.[4] Origin[edit] In 1999, Marc Fleury started a free software project named EJB-OSS (stands for Enterprise Java Bean Open Source Software) implementing the EJB API from J2EE (Java 2 Enterprise Edition). Versions[edit] JBoss AS 4.0, a Java EE 1.4 application server, features an embedded Apache Tomcat 5.5 servlet container. JBoss AS 4.2 also functions as a Java EE 1.4 application server, but deploys Enterprise JavaBeans 3.0 by default.
JBoss AS 5.1, released in 2009, operates as a Java EE 5 application server. JBoss AS 6.0,[8] an unofficial implementation of Java EE 6, was released on December 28, 2010. Product features[edit]