Given the following rules (contrived example):

rule "Monetary 1"

when

            Currency(typeID in (CurrencyConst.DOLLAR, CurrencyConst.EURO, CurrencyConst.YEN))

then

insert(new Fact());

end

rule "Monetary 2"

when

            Currency(typeID in (CurrencyConst.RUBLES, CurrencyConst.WON))

then

insert(new Fact());

end

Is it possible to map constant values into a DSL? 

So the above rules could be partially rewritten as:

rule "Monetary 1"

when

            Currency is one of DOLLAR, EURO, YEN

then

insert(new Fact());

end

rule "Monetary 2"

when

            Currency is one of RUBLES, WON

then

insert(new Fact());

end