hi is it possible to have a dsl providing users to write somthing like : bool1 AND bool2 OR (bool4 AND bool5) I tried to use eval and the mapping bellow : TELS QUE {v1} ET ({v2} OU {v3}) --> eval({v1} && ({v2} || {v3})); In my drl I have this condition : TELS QUE EA001 ET ( N OU F ) But it seems not working : testFromMessage/Rule_indicateur___facturer_0.java (15:551) : Syntax error on token "OU", invalid AssignmentOperator testFromMessage/Rule_indicateur___facturer_0.java (15:554) : F cannot be resolved -- View this message in context: http://www.nabble.com/dsl-mapping-for-and-or-tf4266238.html#a12141603 Sent from the drools - user mailing list archive at Nabble.com.