CancelTaskRequest

    <CancelTaskRequest [id="..."] [comp="(Integer)"] [ms="(Integer)"] [rev="(Integer)"]> ## CancelTaskRequest
        <inst [range="..."] [d="..."] [tz="..."] /> ## InstanceRecurIdInfo
        <tz id="..." stdoff="(Integer)" dayoff="(Integer)" [stdname="..."] [dayname="..."]> ## CalTZInfo
            <standard [week="(Integer)"] [wkday="(Integer)"] mon="(Integer)" [mday="(Integer)"] hour="(Integer)"
                          min="(Integer)" sec="(Integer)" /> ## TzOnsetInfo
            <daylight ... /> ## See /tz/standard [ ## TzOnsetInfo]
         </tz>
        <m [aid="..."] [origid="..."] [rt="..."] [idnt="..."] [su="..."] [irt="..."] [l="..."] [f="..."]> ## Msg
            (<header [name="..."]>{value}</header> ## Msg$Header)*
            <content>{content} (String)</content>
            <mp [ct="..."] [content="..."] [ci="..."]> ## MimePartInfo
                (<mp> ... </mp> ## See /m/mp [ ## MimePartInfo] # [inside itself])*
                <attach [aid="..."]> ## AttachmentsInfo
                    List of any of: {
                        <mp mid="..." part="..." [optional="(0|1)"] /> ## MimePartAttachSpec
                        <m id="..." [optional="(0|1)"] /> ## MsgAttachSpec
                        <cn id="..." [optional="(0|1)"] /> ## ContactAttachSpec
                        <doc [path="..."] [id="..."] [ver="(Integer)"] [optional="(0|1)"] /> ## DocAttachSpec
                    }
                 </attach>
             </mp>
            <attach [aid="..."]> ... </attach> ## See /m/mp/attach [ ## AttachmentsInfo]
            <inv [id="..."] [ct="..."] [ci="..."] [method="..."] [compNum="(Integer)"] [rsvp="(0|1)"] [priority="..."]
                     [name="..."] [loc="..."] [percentComplete="..."] [completed="..."] [noBlob="(0|1)"] [fba="..."] [fb="..."]
                     [transp="..."] [isOrg="(0|1)"] [x_uid="..."] [uid="..."] [seq="(Integer)"] [d="(Long)"] [calItemId="..."]
                     [apptId="..."] [ciFolder="..."] [status="..."] [class="..."] [url="..."] [ex="(0|1)"] [ridZ="..."]
                     [allDay="(0|1)"] [draft="(0|1)"] [neverSent="(0|1)"] [changes="..."]> ## InvitationInfo
                <content [uid="..."] [summary="..."]>{content}</content> ## RawInvite
                <comp [method="..."] [compNum="(Integer)"] [rsvp="(0|1)"] [priority="..."] [name="..."] [loc="..."]
                          [percentComplete="..."] [completed="..."] [noBlob="(0|1)"] [fba="..."] [fb="..."] [transp="..."]
                          [isOrg="(0|1)"] [x_uid="..."] [uid="..."] [seq="(Integer)"] [d="(Long)"] [calItemId="..."]
                          [apptId="..."] [ciFolder="..."] [status="..."] [class="..."] [url="..."] [ex="(0|1)"] [ridZ="..."]
                          [allDay="(0|1)"] [draft="(0|1)"] [neverSent="(0|1)"] [changes="..."]> ## InviteComponent
                    (<category>{categories} (String)</category>)*
                    (<comment>{comments} (String)</comment>)*
                    (<contact>{contacts} (String)</contact>)*
                    <geo [lat="..."] [lon="..."] /> ## GeoInfo
                    (<at [a="..."] [url="..."] [d="..."] [sentBy="..."] [dir="..."] [lang="..."] [cutype="..."] [role="..."]
                             [ptst="..."] [rsvp="(0|1)"] [member="..."] [delTo="..."] [delFrom="..."]> ## CalendarAttendee
                        (<xparam name="..." value="..." /> ## XParam)*
                      </at>)*
                    (<alarm action="..."> ## AlarmInfo
                        <trigger> ## AlarmTriggerInfo
                            <abs d="..." /> ## DateAttr
                            <rel [neg="(0|1)"] [w="(Integer)"] [d="(Integer)"] [h="(Integer)"] [m="(Integer)"]
                                     [s="(Integer)"] [related="..."] [count="(Integer)"] /> ## DurationInfo
                         </trigger>
                        <repeat ... /> ## See /m/inv/comp/alarm/trigger/rel [ ## DurationInfo]
                        <desc>{description} (String)</desc>
                        <attach [uri="..."] [ct="..."]>{binaryB64Data}</attach> ## CalendarAttach
                        <summary>{summary} (String)</summary>
                        (<at ... > ... </at> ## See /m/inv/comp/at [ ## CalendarAttendee])*
                        (<xprop name="..." value="..."> ## XProp
                            (<xparam name="..." value="..." /> ## See /m/inv/comp/at/xparam [ ## XParam])*
                          </xprop>)*
                      </alarm>)*
                    (<xprop name="..." value="..."> ... </xprop> ## See /m/inv/comp/alarm/xprop [ ## XProp])*
                    <fr>{fragment} (String)</fr>
                    <desc>{description} (String)</desc>
                    <descHtml>{htmlDescription} (String)</descHtml>
                    <or [a="..."] [url="..."] [d="..."] [sentBy="..."] [dir="..."] [lang="..."]> ## CalOrganizer
                        (<xparam name="..." value="..." /> ## See /m/inv/comp/at/xparam [ ## XParam])*
                     </or>
                    <recur> ## RecurrenceInfo
                        List of any of: {
                            <add> ## AddRecurrenceInfo
                                List of any of: {
                                    <add> ... </add> ## See /m/inv/comp/recur/add [ ## AddRecurrenceInfo] # [inside itself]
                                    <exclude> ## ExcludeRecurrenceInfo
                                        List of any of: {
                                            <add> ... </add> ## See /m/inv/comp/recur/add [ ## AddRecurrenceInfo] # [inside itself]
                                            <exclude> ... </exclude> ## See /m/inv/comp/recur/add/exclude [ ## ExcludeRecurrenceInfo] # [inside itself]
                                            <except rangeType="(int)" recurId="..." [tz="..."] [ridZ="..."]> ## ExceptionRuleInfo
                                                <add> ... </add> ## See /m/inv/comp/recur [ ## RecurrenceInfo] # [inside itself]
                                                <exclude> ... </exclude> ## See /m/inv/comp/recur [ ## RecurrenceInfo] # [inside itself]
                                             </except>
                                            <cancel rangeType="(int)" recurId="..." [tz="..."] [ridZ="..."] /> ## CancelRuleInfo
                                            <dates [tz="..."]> ## SingleDates
                                                (<dtval> ## DtVal
                                                    <s [d="..."] [tz="..."] [u="(Long)"] /> ## DtTimeInfo
                                                    <e ... /> ## See /m/inv/comp/recur/add/exclude/dates/dtval/s [ ## DtTimeInfo]
                                                    <dur ... /> ## See /m/inv/comp/alarm/trigger/rel [ ## DurationInfo]
                                                  </dtval>)*
                                             </dates>
                                            <rule freq="..."> ## SimpleRepeatingRule
                                                <until d="..." /> ## DateTimeStringAttr
                                                <count num="(int)" /> ## NumAttr
                                                <interval ival="(int)" /> ## IntervalRule
                                                <bysecond seclist="..." /> ## BySecondRule
                                                <byminute minlist="..." /> ## ByMinuteRule
                                                <byhour hrlist="..." /> ## ByHourRule
                                                <byday> ## ByDayRule
                                                    (<wkday day="..." [ordwk="(Integer)"] /> ## WkDay)*
                                                 </byday>
                                                <bymonthday modaylist="..." /> ## ByMonthDayRule
                                                <byyearday yrdaylist="..." /> ## ByYearDayRule
                                                <byweekno wklist="..." /> ## ByWeekNoRule
                                                <bymonth molist="..." /> ## ByMonthRule
                                                <bysetpos poslist="..." /> ## BySetPosRule
                                                <wkst day="..." /> ## WkstRule
                                                (<rule-x-name [name="..."] [value="..."] /> ## XNameRule)*
                                             </rule>
                                        }
                                     </exclude>
                                    <except ... > ... </except> ## See /m/inv/comp/recur/add/exclude/except [ ## ExceptionRuleInfo]
                                    <cancel ... /> ## See /m/inv/comp/recur/add/exclude/cancel [ ## CancelRuleInfo]
                                    <dates [tz="..."]> ... </dates> ## See /m/inv/comp/recur/add/exclude/dates [ ## SingleDates]
                                    <rule freq="..."> ... </rule> ## See /m/inv/comp/recur/add/exclude/rule [ ## SimpleRepeatingRule]
                                }
                             </add>
                            <exclude> ... </exclude> ## See /m/inv/comp/recur/add/exclude [ ## ExcludeRecurrenceInfo]
                            <except ... > ... </except> ## See /m/inv/comp/recur/add/exclude/except [ ## ExceptionRuleInfo]
                            <cancel ... /> ## See /m/inv/comp/recur/add/exclude/cancel [ ## CancelRuleInfo]
                            <dates [tz="..."]> ... </dates> ## See /m/inv/comp/recur/add/exclude/dates [ ## SingleDates]
                            <rule freq="..."> ... </rule> ## See /m/inv/comp/recur/add/exclude/rule [ ## SimpleRepeatingRule]
                        }
                     </recur>
                    <exceptId d="..." [tz="..."] [rangeType="(Integer)"] /> ## ExceptionRecurIdInfo
                    <s ... /> ## See /m/inv/comp/recur/add/exclude/dates/dtval/s [ ## DtTimeInfo]
                    <e ... /> ## See /m/inv/comp/recur/add/exclude/dates/dtval/s [ ## DtTimeInfo]
                    <dur ... /> ## See /m/inv/comp/alarm/trigger/rel [ ## DurationInfo]
                 </comp>
                (<tz ... > ... </tz> ## See /tz [ ## CalTZInfo])*
                (<mp ... > ... </mp> ## See /m/mp [ ## MimePartInfo])*
                <attach [aid="..."]> ... </attach> ## See /m/mp/attach [ ## AttachmentsInfo]
                (<category>{categories} (String)</category>)*
                (<comment>{comments} (String)</comment>)*
                (<contact>{contacts} (String)</contact>)*
                <geo [lat="..."] [lon="..."] /> ## See /m/inv/comp/geo [ ## GeoInfo]
                (<at ... > ... </at> ## See /m/inv/comp/at [ ## CalendarAttendee])*
                (<alarm action="..."> ... </alarm> ## See /m/inv/comp/alarm [ ## AlarmInfo])*
                (<xprop name="..." value="..."> ... </xprop> ## See /m/inv/comp/alarm/xprop [ ## XProp])*
                <fr>{fragment} (String)</fr>
                <desc>{description} (String)</desc>
                <descHtml>{htmlDescription} (String)</descHtml>
                <or ... > ... </or> ## See /m/inv/comp/or [ ## CalOrganizer]
                <recur> ... </recur> ## See /m/inv/comp/recur [ ## RecurrenceInfo]
                <exceptId ... /> ## See /m/inv/comp/exceptId [ ## ExceptionRecurIdInfo]
                <s ... /> ## See /m/inv/comp/recur/add/exclude/dates/dtval/s [ ## DtTimeInfo]
                <e ... /> ## See /m/inv/comp/recur/add/exclude/dates/dtval/s [ ## DtTimeInfo]
                <dur ... /> ## See /m/inv/comp/alarm/trigger/rel [ ## DurationInfo]
             </inv>
            (<e a="..." [t="..."] [p="..."] /> ## EmailAddrInfo)*
            (<tz ... > ... </tz> ## See /tz [ ## CalTZInfo])*
            <fr>{fragment} (String)</fr>
         </m>
    </CancelTaskRequest>

elements and attributes you can define within a <CancelTaskRequest> element:

CancelTaskResponse

    <CancelTaskResponse /> ## CancelTaskResponse