If you need the value on the RHS, you can use s.th. like lang.get("Japanese") or $c.getLanguage().get("Japanese") If you want to match the value in a subsequent pattern, you could use an eval() or similar; since you don't show what you need the value for, I'll not enumerate all possibilities. -W On 11 August 2010 06:09, Manav <manav7574(a)yahoo.com&gt; wrote:

Thanks a lot Edson . The below approach worked like a charrm :).  I went with the second approach     Client( languages.keySet contains "Japanese",  $lang : language["Japanese"] ) Regards, Akash   ________________________________ From: Edson Tirelli <tirelli(a)post.com&gt; To: Manav <manav7574(a)yahoo.com>; Rules Users List <rules-users(a)lists.jboss.org&gt; Sent: Wed, August 11, 2010 7:46:40 PM Subject: Re: [rules-users] Retrieve values from a Map     Did you tried this?     Client(  $lang : language["Japanese"] != null )     This will bind $lang to the value associated with the key "Japanese" on the "languages" map and at the same time check that the value is not null. If you want to explicit test if there is a key "Japanese" in the map, then you can do:     Client( languages.keySet contains "Japanese",  $lang : language["Japanese"] )     Edson 2010/8/11 Manav <manav7574(a)yahoo.com&gt; I am new to drools and currently using version 5.1 for my testing. --   Edson Tirelli   JBoss Drools Core Development   JBoss by Red Hat @ www.jboss.com