Mandarax Querying....pls help

[s mahen perera]

Hi all,

I have the following Rule-ml.
<rulebase>
<imp>

<_head>

<atom>

<_opr>

<rel>Variation in Claims</rel>

</_opr>

<ind>true</ind>

</atom>

</_head>

<_body>

<and>

<atom>

<_opr>

<rel>Advance Stage in Negotiation</rel>

</_opr>

<ind>true</ind>

</atom>

<atom>

<_opr>

<rel>Reliable Measurement of Claim</rel>

</_opr>

<ind>true</ind>

</atom>

</and>

</_body>

</imp>

</rulebase>


I imported this Rule-ml fragment in to a Mandarax knowledge base using "RuleML0_8_1Driver.importKnowledgeBase()" and the knowledge base imported was kb.

I need to query this rule-ml and see whether the head fact is evaluating to true.

For that i did the following..

List list = new ArrayList();
Fact headFact = logicFactory.createFact(new SimplePredicate("Variation in Claims",new Class[]{String.class}),new Term[]{logicFactory.createVariableTerm("result",String.class )});

list.add(headFact);

Fact bodyFact = logicFactory.createFact(new SimplePredicate("Advance Stage in Negotiation",new Class[]{String.class}),new Term[]{logicFactory.createConstantTerm(selected,String.class)});


list.add(bodyFact);

Fact bodyFact 1= logicFactory.createFact(new SimplePredicate("Reliable Measurement of Claim",new Class[]{String.class}),new Term[]{logicFactory.createConstantTerm(selected,String.class)});


list.add(bodyFact1);

Fact[] factArr= (Fact[])list.toArray(new Fact[]{});
Query qry = logicFactory.createQuery(factArr,"a query");

ResultSet results=null;
try {
results = ie.query(qry, kb, ie.ONE, ie.BUBBLE_EXCEPTIONS);
//System.out.println("Result is : " + results);
// List w = results.getQueryVariables ();
//results.
results.next();
// Map m = results.getResults();
//results.g

Object obj = results.getResult(String.class,"result");
System.out.println ("result is : " + obj);


}
catch (InferenceException ex2) {
System.out.println("Exception while Querying KB..............");
}



But i didnt get the result

Pls someone help. Thanks in advance for any feedback

Mahen