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

[Godmar Back]

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