[rules-users] phone number validation using drools

Hi , i am trying validate complex expression for phone numberl? rule "test2" when $m : Message(email:email,phone:phone) Message(phone matches "^(([\\+]?\\d{1,3}(-|\\.)?\\(?\\w\\)?(-|\\.)?\\d{1,3})|( \\(?\\d{2,3}\\)?))(-|\\.)?(\\d{3,4})(-|\\.)?(\\d{4<file://(/?\\d{2,3}\\)?))(-|\\.)?(\\d{3,4})(-|\\.)?(\\d{4>})(( x| ext)\\d{1,5}){0,1}$" then System.out.println("Invalid phone number: " + phone ); end " in this case some error should be comming.pls find out whethere the expression is correct or not. java.util.regex.PatternSyntaxException: Unknown inline modifier near index 21 ^(([+]?d{1,3}(-|.)?(?w)?(-|.)?d{1,3})|((?d{2,3})?))(-|.)?(d{3,4})(-|.)?(d{4})(( x| ext)d{1,5}){0,1}$ ^ at java.util.regex.Pattern.error(Pattern.java:1713) at java.util.regex.Pattern.group0(Pattern.java:2519) at java.util.regex.Pattern.sequence(Pattern.java:1806) at java.util.regex.Pattern.expr(Pattern.java:1752) at java.util.regex.Pattern.group0(Pattern.java:2530) at java.util.regex.Pattern.sequence(Pattern.java:1806) at java.util.regex.Pattern.expr(Pattern.java:1752) at java.util.regex.Pattern.group0(Pattern.java:2530) at java.util.regex.Pattern.sequence(Pattern.java:1806) at java.util.regex.Pattern.expr(Pattern.java:1752) at java.util.regex.Pattern.compile(Pattern.java:1460) at java.util.regex.Pattern.<init>(Pattern.java:1133) at java.util.regex.Pattern.compile(Pattern.java:823) at java.util.regex.Pattern.matches(Pattern.java:928) at java.lang.String.matches(String.java:2091) at org.drools.base.evaluators.StringFactory$StringMatchesEvaluator.evaluate(StringFactory.java:211) at org.drools.rule.LiteralRestriction.isAllowed(LiteralRestriction.java:61) at org.drools.rule.LiteralConstraint.isAllowed(LiteralConstraint.java:82) at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:132) at org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:318) at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:153) at org.drools.reteoo.Rete.assertObject(Rete.java:175) at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:192) at org.drools.reteoo.ReteooWorkingMemory.doInsert(ReteooWorkingMemory.java:71) at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:909) at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:881) at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:682) at com.sample.DroolsTest.main(DroolsTest.java:40) regards, Chanti