[rules-dev] Reading value from map at runtime

Dear All, I am new in the guvmor development environment. I am facing the following problem: I have one map (key, value pair). A user wants to write a DSL rule using key. The requirement is that the key should be replaced with value when drools fire the rule. My questions are the following: 1. How to prepare a map? 2. Is it possible to replace a key with value at runtime? I shall be thankful to your cooperation. Best Regards, Nasir