ruleset.xml

<?xml version="1.0"?>
<ruleset name="My first PHPMD rule set"
         xmlns="http://pmd.sf.net/ruleset/1.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://pmd.sf.net/ruleset/1.0.0
                     http://pmd.sf.net/ruleset_xml_schema.xsd"
         xsi:noNamespaceSchemaLocation="
                     http://pmd.sf.net/ruleset_xml_schema.xsd">
    <description>
        My custom rule set that checks my code...
    </description>

    <!-- Import the entire unused code rule set -->
    <rule ref="rulesets/unusedcode.xml/UnusedLocalVariable">
		<priority>1</priority>
    </rule>
	<rule ref="rulesets/unusedcode.xml/UnusedPrivateField">
		<priority>1</priority>
    </rule>
	<rule ref="rulesets/unusedcode.xml/UnusedPrivateMethod">
		<priority>1</priority>
    </rule>
	<rule ref="rulesets/unusedcode.xml/UnusedFormalParameter">
		<priority>1</priority>
    </rule>
</ruleset>