CheckRecurConflictsRequest

    <CheckRecurConflictsRequest [s="{start-time-millis} (Long)"] [e="{end-time-millis} (Long)"]
                                   [all="{get-all-instances} (0|1)"] [excludeUid="{exclude-uid}"]> ## CheckRecurConflictsRequest
        (<tz id="{timezone-id}" stdoff="{timezone-std-offset} (Integer)" dayoff="{timezone-daylight-offset} (Integer)"
                 [stdname="..."] [dayname="..."]> ## CalTZInfo
            <standard [week="{tzonset-week} (Integer)"] [wkday="{tzonset-day-of-week} (Integer)"]
                          mon="{tzonset-month} (Integer)" [mday="{tzonset-day-of-month} (Integer)"]
                          hour="{tzonset-hour} (Integer)" min="{tzonset-minute} (Integer)" sec="{tzonset-second} (Integer)" /> ## TzOnsetInfo
            <daylight ... /> ## See /tz/standard [ ## TzOnsetInfo]
          </tz>)*
        List of any of: {
            <cancel [s="{dtstart-millis} (Long)"] [e="{dtend-millis} (Long)"]> ## ExpandedRecurrenceCancel
                <exceptId [range="{range-THISANDFUTURE|THISANDPRIOR}"] [d="{DATETIME-YYYYMMDD['T'HHMMSS[Z]]}"]
                              [tz="{timezone-identifier}"] /> ## InstanceRecurIdInfo
                <dur [neg="{duration-negative} (0|1)"] [w="{duration-weeks} (Integer)"] [d="{duration-days} (Integer)"]
                         [h="{duration-hours} (Integer)"] [m="{duration-minutes} (Integer)"]
                         [s="{duration-seconds} (Integer)"] [related="{alarm-related}"]
                         [count="{alarm-repeat-count} (Integer)"] /> ## DurationInfo
                <recur> ## RecurrenceInfo
                    List of any of: {
                        <add> ## AddRecurrenceInfo
                            List of any of: {
                                <add> ... </add> ## See /cancel/recur/add [ ## AddRecurrenceInfo] # [inside itself]
                                <exclude> ## ExcludeRecurrenceInfo
                                    List of any of: {
                                        <add> ... </add> ## See /cancel/recur/add [ ## AddRecurrenceInfo] # [inside itself]
                                        <exclude> ... </exclude> ## See /cancel/recur/add/exclude [ ## ExcludeRecurrenceInfo] # [inside itself]
                                        <except rangeType="{range-type} (int)" recurId="{YYMMDD[THHMMSS[Z]]}"
                                                    [tz="{timezone-name}"] [ridZ="{YYMMDDTHHMMSSZ}"]> ## ExceptionRuleInfo
                                            <add> ... </add> ## See /cancel/recur [ ## RecurrenceInfo] # [inside itself]
                                            <exclude> ... </exclude> ## See /cancel/recur [ ## RecurrenceInfo] # [inside itself]
                                         </except>
                                        <cancel rangeType="{range-type} (int)" recurId="{YYMMDD[THHMMSS[Z]]}"
                                                    [tz="{timezone-name}"] [ridZ="{YYMMDDTHHMMSSZ}"] /> ## CancelRuleInfo
                                        <dates [tz="{TZID}"]> ## SingleDates
                                            (<dtval> ## DtVal
                                                <s [d="{YYYYMMDD['T'HHMMSS[Z]]}"] [tz="{timezone-identifier}"]
                                                       [u="{utc-time} (Long)"] /> ## DtTimeInfo
                                                <e ... /> ## See /cancel/recur/add/exclude/dates/dtval/s [ ## DtTimeInfo]
                                                <dur ... /> ## See /cancel/dur [ ## DurationInfo]
                                              </dtval>)*
                                         </dates>
                                        <rule freq="{freq}"> ## SimpleRepeatingRule
                                            <until d="{YYYYMMDD[ThhmmssZ]}" /> ## DateTimeStringAttr
                                            <count num="{num} (int)" /> ## NumAttr
                                            <interval ival="{rule-interval} (int)" /> ## IntervalRule
                                            <bysecond seclist="{second-list}" /> ## BySecondRule
                                            <byminute minlist="{minute-list}" /> ## ByMinuteRule
                                            <byhour hrlist="{hour-list}" /> ## ByHourRule
                                            <byday> ## ByDayRule
                                                (<wkday day="{weekday}" [ordwk="{ord-wk-[[+]|-]num} (Integer)"] /> ## WkDay)*
                                             </byday>
                                            <bymonthday modaylist="{modaylist}" /> ## ByMonthDayRule
                                            <byyearday yrdaylist="{byyearday-yrdaylist}" /> ## ByYearDayRule
                                            <byweekno wklist="{byweekno-wklist}" /> ## ByWeekNoRule
                                            <bymonth molist="{month-list}" /> ## ByMonthRule
                                            <bysetpos poslist="{bysetpos-list}" /> ## BySetPosRule
                                            <wkst day="{weekday}" /> ## WkstRule
                                            (<rule-x-name [name="{xname-name}"] [value="{xname-value}"] /> ## XNameRule)*
                                         </rule>
                                    }
                                 </exclude>
                                <except ... > ... </except> ## See /cancel/recur/add/exclude/except [ ## ExceptionRuleInfo]
                                <cancel ... /> ## See /cancel/recur/add/exclude/cancel [ ## CancelRuleInfo]
                                <dates [tz="{TZID}"]> ... </dates> ## See /cancel/recur/add/exclude/dates [ ## SingleDates]
                                <rule freq="{freq}"> ... </rule> ## See /cancel/recur/add/exclude/rule [ ## SimpleRepeatingRule]
                            }
                         </add>
                        <exclude> ... </exclude> ## See /cancel/recur/add/exclude [ ## ExcludeRecurrenceInfo]
                        <except ... > ... </except> ## See /cancel/recur/add/exclude/except [ ## ExceptionRuleInfo]
                        <cancel ... /> ## See /cancel/recur/add/exclude/cancel [ ## CancelRuleInfo]
                        <dates [tz="{TZID}"]> ... </dates> ## See /cancel/recur/add/exclude/dates [ ## SingleDates]
                        <rule freq="{freq}"> ... </rule> ## See /cancel/recur/add/exclude/rule [ ## SimpleRepeatingRule]
                    }
                 </recur>
             </cancel>
            <comp [s="{dtstart-millis} (Long)"] [e="{dtend-millis} (Long)"]> ## ExpandedRecurrenceInvite
                <exceptId ... /> ## See /cancel/exceptId [ ## InstanceRecurIdInfo]
                <dur ... /> ## See /cancel/dur [ ## DurationInfo]
                <recur> ... </recur> ## See /cancel/recur [ ## RecurrenceInfo]
             </comp>
            <except [s="{dtstart-millis} (Long)"] [e="{dtend-millis} (Long)"]> ## ExpandedRecurrenceException
                <exceptId ... /> ## See /cancel/exceptId [ ## InstanceRecurIdInfo]
                <dur ... /> ## See /cancel/dur [ ## DurationInfo]
                <recur> ... </recur> ## See /cancel/recur [ ## RecurrenceInfo]
             </except>
        }
        (<usr [l="{calendar-folder-id} (Integer)"] [id="{id}"] [name="{email}"] /> ## FreeBusyUserSpec)*
    </CheckRecurConflictsRequest>

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

     YYYY - 4 digit year
     MM   - 2 digit month
     DD   - 2 digit day
 Optionally:
     'T' the literal char "T" then 
     HH - 2 digit hour (00-23)
     MM - 2 digit minute (00-59)
     SS - 2 digit second (00-59)
     ...and finally an optional "Z" meaning that the time is UTC,
     otherwise the tz="TIMEZONE" param MUST be specified with the DATETIME
     e.g:
         20050612  June 12, 2005
         20050315T18302305Z  March 15, 2005 6:30:23.05 PM UTC
 

     YYYY - 4 digit year
     MM   - 2 digit month
     DD   - 2 digit day
 Optionally:
     'T' the literal char "T" then
     HH - 2 digit hour (00-23)
     MM - 2 digit minute (00-59)
     SS - 2 digit second (00-59)
     ...and finally an optional "Z" meaning that the time is UTC,
     otherwise the tz="TIMEZONE" param MUST be specified with the DATETIME
     e.g:
         20050612  June 12, 2005
         20050315T18302305Z  March 15, 2005 6:30:23.05 PM UTC
 

CheckRecurConflictsResponse

    <CheckRecurConflictsResponse> ## CheckRecurConflictsResponse
        (<inst [s="{start-time-millis} (Long)"] [dur="{duration-millies} (Long)"] [allDay="{is-all-day} (0|1)"]
                   [tzo="{tz-offset-millis} (Integer)"] [ridZ="{utc-recurrence-id}"]> ## ConflictRecurrenceInstance
            (<usr name="{email}" fb="{freebusy-status-B|T|O}" /> ## FreeBusyUserStatus)*
          </inst>)*
    </CheckRecurConflictsResponse>

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