Example

http://calendarserver/verifytodos_by_ids.wcap
                     ?id=bo35r2pr3e5po35r
                     &calid=jdoe
                     &uid=3bde188f0000472d0000000b00000399
                     &rid=20021029T200200Z
                     &fmt-out=text/xml

<?xml version="1.0" encoding="UTF-8"?\>
 <iCalendar\>
 <iCal version="6.0" prodid="-//SunONE/Calendar Hosting Server//EN"\>
 <TODO\>
 <UID\>3bde188f0000472d0000000b00000399</UID\>
 <RECURID\>20021029T200200Z</RECURID\>
 </TODO\>
 </iCal\>
 </iCalendar\>