[rules-users] escaping backslash in matches clauses (documentation bug?)

The documentation states that '\' occurring in matches clauses do not need escaping. However, unescaped '\' cause this error message when compiling the .drl file: Exception in thread "main" org.drools.rule.InvalidRulePackage: Unable to determine the used declarations : [Rule name=Apply XML Descriptor, agendaGroup=MAIN, salience=0, no-loop=false] at org.drools.rule.Package.checkValidity(Package.java:419) at org.drools.common.AbstractRuleBase.addPackage(AbstractRuleBase.java:292) Escaping the '\' as is customary in Java makes the code work. - Godmar