In order for a multi-select list-box to make sense the operator would need to be "in" or "not in". The operator is not explicitly parsed within a DSL sentence and hence it is impossible to ascertain if the list-box should allow multiple select. If you wanted to generate separate rules for each selected entry in the list-box you could look into using a Rule Template **in the future**. Unfortunately DSL sentences in Guvnor do not currently (5.4.0.Final) support Template Keys, hence the significance of "in the future" in the foregoing sentence. With kind regards, Mike On 7 September 2012 20:23, bhochhi <bhochhi(a)aol.com&gt; wrote: