Something

<modules>
    <module name="square">
        <function api_call="getSquare" symbol="square" role="foo,bar" ret_type="1" argc="2" />
        <function api_call="setSquare" symbol="square" role="foo,bar" ret_type="1" argc="2" />
    </module>
    <module name="openvz">
        <function api_call="vz_create" symbol="vzctl_create" role="foo,bar" ret_type="2" argc="2" />
        <function api_call="vz_destory" symbol="vzctl_destory" role="foo,bar" ret_type="1" argc="2" />
    </module>
    <module name="ldap">
        <function api_call="auth" symbol="authenticate" role="foo,bar" ret_type="0" argc="2" />
    </module>
    <module name="services">
        <function api_call="service_start" symbol="sc_start" role="foo,bar" ret_type="0" argc="1"
            valid_args="mysql jboss apache2"/>
        <function api_call="service_stop" symbol="sc_stop" role="foo,bar" ret_type="0" argc="1" 
            valid_args="mysql jboss apache2"/>
        <function api_call="service_restart" symbol="sc_restart" role="foo,bar" ret_type="0" argc="1"
            valid_args="mysql jboss apache2"/>
    </module>
</modules>