I'm trying to create DSL and DSLR out of DRL but so far unsuccessfull with this small example- DRL (Working OK)- #created on: Apr 30, 2011 package com.fire #list any import classes here. import com.fire.*; #declare any global variables here rule "When there is a fire turn on the sprinkler" when #conditions Fire( $room : room ) $sprinkler : Sprinkler( room == $room, on == false ) then #actions modify($sprinkler){setOn(true)}; System.out.println( "Turn on the sprinkler for room " + $room.getName() ); end DSL- [condition][]There is fire in "{room}"=Fire( "{room}" : room ) [condition][]"{sprinkler}" is in same "{room}" and sprinkler is "{off}"="{sprinkler}" : Sprinkler( room == "{room}", on == "{off}" ) [consequence][]Turn on the "{sprinkler}"=modify("{sprinkler}"){setOn(true)}; DSLR- (Error message when compiling mismatched input) #created on: Apr 30, 2011 package com.fire expander fireAlarm.dsl #list any import classes here. import com.fire.*; rule "When there is a fire turn on the sprinkler" when #conditions There is fire in "{room}" "{sprinkler}" is in same "{room}" and sprinkler is "{off}" then #actions Turn on the "{sprinkler}" log; end Can somebody point out what I am doing wrong? -- View this message in context: http://drools.46999.n3.nabble.com/Unable-to-create-DSL-properly-tp2901873... Sent from the Drools: User forum mailing list archive at Nabble.com.