<rule-set 
    name="Demo Rules"
    description="Demo Rules"
    xmlns="http://drools.org/rules"
    xmlns:java="http://drools.org/semantics/java"
    xmlns:xs="http://www.w3.org/2001/XMLSchema-instance"
    xs:schemaLocation="http://drools.org/rules rules.xsd
                       http://drools.org/semantics/java java.xsd">

  <rule name="Rule One" xor-group="group1">
    <parameter identifier="param">
      <class>java.lang.String</class>
    </parameter>
    <java:condition>param.equals("hello")</java:condition>
    <java:consequence>
    	System.out.println("Rule ONE fired.");
    </java:consequence>
  </rule>

  <rule name="Rule Two" xor-group="group1">
    <parameter identifier="param">
      <class>java.lang.String</class>
    </parameter>
    <java:condition>param.equals("world")</java:condition>
    <java:consequence>
    	System.out.println("Rule TWO fired.");
    </java:consequence>
  </rule>

</rule-set>