Hi Reminder The EulerGUI Integrated Development Environment (IDE) allows one to develop and run rules in N3 logic language, applied to data and models in various formats converted in N3 (Notation 3). N3 is a convergence language that allows to express data (facts), classes and properties, and rules. It is the main language for the Semantic Web, being much more readable and concise than RDF (Resource Description Format). Compared to pure point-and-click tools like Protégé, EulerGUI is centered on textual editor for N3 source. EulerGUI is Open Source, written in Java Swing. SWRL rules are executed by a translator into N3 rules. One of the 4 rules engines in EulerGUI is based on a translation of N3 rules onto Drools' DRL language. So Drools in this case is used as a pure rule engine. The main new feature is a 2 clicks tool to add all referred ontologies to current project. This plays particularly well with other features. You can refer to an ontology or vocabulary by using its common prefix in the editor, e.g. : :p a foaf:Person . Then, upon saving the corresponding prefix declaration will be added by looking up the http://prefix.cc web service : @prefix foaf: <http://xmlns.com/foaf/0.1/> . Then with the new feature, you can actually add the URI of the FOAF prefix to the project, which downloads the FOAF ontology as N3. You can then consult the FOAF ontology in the N3 editor, to discover all available properties and classes. These properties' label and RDF comments are also visible in the editor as tooltips. You can also launch the OWL reasoner, which shows a tree view of classes in FOAF and in all N3 sources in project. The second new feature is a button to stop the current inference engine. This is useful when a bad rule base goes into an infinite loop. As a side dish, there is a rule base that acts as a helper for documenting a rule base. That is, every non declared property generates a skeleton declaration; the same for undeclared classes. Here is a how-to: http://eulergui.svn.sourceforge.net/viewvc/eulergui/trunk/eulergui/html/d... Download from https://sourceforge.net/projects/eulergui EulerGUI Manual here: http://eulergui.svn.sourceforge.net/viewvc/eulergui/trunk/eulergui/html/d... -- Jean-Marc Vanel Déductions SARL - Consulting, services, training, Rule-based programming, Semantic Web http://jmvanel.free.fr/ - EulerGUI, a turntable GUI for Semantic Web + rules, XML, UML, eCore, Java bytecode +33 (0)6 89 16 29 52 -- +33 (0)1 39 55 58 16 ( we rarely listen to voice messages, please send a mail instead ) -- Jean-Marc Vanel Déductions SARL - Consulting, services, training, Rule-based programming, Semantic Web http://jmvanel.free.fr/ - EulerGUI, a turntable GUI for Semantic Web + rules, XML, UML, eCore, Java bytecode +33 (0)6 89 16 29 52 -- +33 (0)1 39 55 58 16 ( we rarely listen to voice messages, please send a mail instead ) -- Jean-Marc Vanel Déductions SARL - Consulting, services, training, Rule-based programming, Semantic Web http://jmvanel.free.fr/ - EulerGUI, a turntable GUI for Semantic Web + rules, XML, UML, eCore, Java bytecode +33 (0)6 89 16 29 52 -- +33 (0)1 39 55 58 16 ( we rarely listen to voice messages, please send a mail instead ) -- Jean-Marc Vanel Déductions SARL - Consulting, services, training, Rule-based programming, Semantic Web http://jmvanel.free.fr/ - EulerGUI, a turntable GUI for Semantic Web + rules, XML, UML, eCore, Java bytecode +33 (0)6 89 16 29 52 -- +33 (0)1 39 55 58 16 ( we rarely listen to voice messages, please send a mail instead )