[rules-users] Accessing maps (hashmaps) keys and values in rules

[Mehak]

 Hi
I am using xml drl files for my rules. I pass the facts in HashMap.
             Map factAgendaMap = new HashMap();
             factAgendaMap.put("group", ruleConfig.getRuleName());
	factAgendaMap.put("fact", fact);
	session.execute(factAgendaMap);
In my drl file I m calling the rule as
<rule name="rule1">  
<rule-attribute name="activation-group" value="abc"/>
 	<lhs>  
 	<pattern identifier="map" object-type="HashMap">  
 	</pattern>
 	<pattern identifier = "task" object-type = "Task">
 	   	<from> 
 	 <expression> map.get("fact")
           </expression>
           
    </from> 
<or-constraint-connective>
     	<field-constraint field-name="childTasks.size()">  
			<literal-restriction evaluator="==" value="null"/> 
		</field-constraint> 
		 
		<field-constraint field-name="childTasks.size()">  
			<literal-restriction evaluator="==" value="null"/> 
		</field-constraint>
	</or-constraint-connective>
  	
</pattern>  	
</lhs>
	<rhs>  
	 System.out.println("Success rule1 activation");
   	</rhs>
</rule> 

This is giving me error that <from> tag placed misappropriately. I want to
use OR constraint on the facts passed in HashMap.
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