Hi, This might be a dumb question but I've been experimenting with DSLs and DSLRs (apart from the Guvnor) and had some limited success with creating simple English-ish rules like this one: rule "cheese_location_rule" when Cheese is "cheddar" and is from Italy then Add the message "Cheddar is from Italy" end One of the language we are seeking to model is Arden via MLMs. I know based on other posts that Arden is not really popular as a candidate for seamless integration into DROOLS http://drools.46999.n3.nabble.com/Arden-Syntax-support-in-Drools-Guvnor-t... But if one can only express whatever "language" in either the WHEN or the THEN, then I guess I don't see the utility of it except as a grammatical fragment of an overall language. We were hoping to use the Guvnor as a rule authoring tool for Arden and possibly other languages. But MLMs are very specific and procedural and (on the whole) don't match the WHEN/THEN form. But is there any other way to author an Arden MLM from within the Guvnor (or any arbitrary rule file for that matter) so that we can take advantage of the grammar aware features of the editor and it's content management abilities? Or is it the case that the WHEN simply acts as the trigger for the rule execution and the when can somehow "#INCLUDE" a separate flat file containing the MLM that is editable via the Guvnor? Thanks, Jeff -- View this message in context: http://drools.46999.n3.nabble.com/DSL-Question-tp3040701p3040701.html Sent from the Drools: User forum mailing list archive at Nabble.com.