<?xml version="1.0" encoding="utf-8" ?>
<C:calendar-query xmlns:C="urn:ietf:params:xml:ns:caldav">
    <D:prop xmlns:D="DAV:">
        <D:getetag/>
        <C:calendar-data/>
    </D:prop>
    <C:filter>
        <C:comp-filter name="VCALENDAR">
            <C:comp-filter name="VEVENT">
                <C:prop-filter name="ATTENDEE">
                    <C:text-match collation="i;ascii-casemap"
                            >mailto:lisa@example.com</C:text-match>
                    <C:param-filter name="PARTSTAT">
                        <C:text-match collation="i;ascii-casemap"
                                >NEEDS-ACTION</C:text-match>
                    </C:param-filter>
                </C:prop-filter>
            </C:comp-filter>
        </C:comp-filter>
    </C:filter>
</C:calendar-query>