Namespace

ECal – 2.0

Client library for Evolution Data Server calendars

Version	3.53.1
Authors	Evolution Data Server Development Team
License	LGPL-2.0-only
Website
Source	https://gitlab.gnome.org/GNOME/evolution-data-server/

Build

C headers	`libecal/libecal.h`
pkg-config files	`libecal-2.0`

Dependencies

GObject—2.0	The base type system library
	Browse documentation
EDataServer—1.2	Utility library for Evolution Data Server
	Browse documentation

Additional documentation

Classes Hierarchy

Classes

Client	Contains only private data that should be read and manipulated using the functions below. since: 3.2
ClientView	Contains only private data that should be read and manipulated using the functions below. since: 3.2
Component
ReminderWatcher	Contains only private data that should be read and manipulated using the functions below. since: 3.30

Interfaces

TimezoneCache

since: 3.8

Structs

ClientTzlookupICalCompData	Contains data used as lookup_data of e_cal_client_tzlookup_icalcomp_cb(). since: 3.34
ComponentAlarm	Opaque structure, which represents alarm subcomponents. Use the functions below to work with it.
ComponentAlarmInstance	Opaque structure, which represents an alarm occurrence, i.e. a instance instance. Use the functions below to work with it.
ComponentAlarmRepeat	A structure holding whether and how an alarm repeats. Use the functions below to work with it.
ComponentAlarms	Opaque structure, which represents alarm trigger instances for a particular component. Use the functions below to work with it.
ComponentAlarmTrigger	Opaque structure, which represents when an alarm is supposed to be triggered. Use the functions below to work with it.
ComponentAttendee	Describes an attendee. Use the functions below to work with it.
ComponentDateTime	An opaque structure containing an `ICalTime` describing the date/time value and also its TZID parameter. Use the functions below to work with it.
ComponentId	An opaque structure containing UID of a component and its recurrence ID (which can be `NULL`). Use the functions below to work with it.
ComponentOrganizer	Describes an organizer. Use the functions below to work with it.
ComponentParameterBag	Opaque structure, which represents a bad (list) of `ICalParameter` objects. Use the functions below to work with it.
ComponentPeriod	Period of time, can have explicit start/end times or start/duration instead. Use the functions below to work with it.
ComponentPropertyBag	Opaque structure, which represents a bad (list) of `ICalProperty` objects. Use the functions below to work with it.
ComponentRange	Describes a range. Use the functions below to work with it.
ComponentText	Contains description string and an alternate representation URI for text properties. Use the functions below to work with it.
ReminderData	Contains data related to single reminder occurrence. since: 3.30

Enumerations

ClientError	since: 3.2
ClientSourceType	Indicates the type of calendar. since: 3.2
ComponentAlarmAction	Alarm types.
ComponentAlarmTriggerKind
ComponentClassification	CLASSIFICATION property.
ComponentPeriodKind	Way in which a period of time is specified.
ComponentRangeKind	The kind of range.
ComponentTransparency	Time transparency.
ComponentVType	Types of calendar components to be stored by a ECalComponent, as per RFC 2445. We don’t put the alarm component type here since we store alarms as separate structures inside the other “real” components.
IntervalUnits	Declares interval units. since: 3.52

Bitfields

ClientViewFlags	Flags that control the behaviour of an `ECalClientView`. since: 3.6
ObjModType	Indicates the type of modification made to a calendar. since: 3.8
OperationFlags	Calendar operation flags, to specify behavior in certain situations. The conflict resolution mode flags cannot be combined together, where the `E_CAL_OPERATION_FLAG_CONFLICT_KEEP_LOCAL` is the default behavior (and it is used when no other conflict resolution flag is set). The flags can be ignored when the operation or the backend don’t support it. since: 3.34
RecurDescribeRecurrenceFlags	Influences behaviour of e_cal_recur_describe_recurrence(). since: 3.30
ReminderWatcherDescribeFlags	Flags modifying behaviour of e_reminder_watcher_describe_data(). since: 3.30

Callbacks

ComponentParameterBagFilterFunc	A function used to filter which parameters should be added to the bag, when filling it with `e_cal_component_parameter_bag_new_from_property()` and e_cal_component_parameter_bag_set_from_property(). since: 3.34
ComponentPropertyBagFilterFunc	A function used to filter which properties should be added to the bag, when filling it with `e_cal_component_property_bag_new_from_component()` and e_cal_component_property_bag_set_from_component(). since: 3.34
RecurFormatDateTimeFunc	Format the date/time value from `itt` into `buffer`, whose size cannot exceed `buffer_size` letters. since: 3.38
RecurInstanceCb	Callback used by e_cal_recur_generate_instances_sync(), called for each instance of a (recurring) component within given time range. since: 3.34
RecurResolveTimezoneCb	Resolve timezone by its ID provided as `tzid`. The returned object, if not `NULL`, is owned by the callback implementation and should not be freed. since: 3.34
UtilFilterPropertyFunc	Function used to determine whether the given property `prop` should be considered. since: 3.52
UtilForeachCategoryFunc	Function called for each non-empty category from e_cal_util_foreach_category(). The `func` can assume owenrship of the `inout_category` content, in which case it should also set its content to `NULL`, to avoid free of it. The string itself, if taken, should be freed with g_free(), when no longer needed. since: 3.48

Functions

isodate_from_time_t	Creates an ISO 8601 UTC representation from a time value.
match_tzid	Matches `tzid` against the system timezone definitions and returns the matching TZID, or `NULL` if none found. since: 2.24
recur_describe_recurrence	Describes some simple types of recurrences in a human-readable and localized way. The `flags` influence the output format and what to do when the `icalcomp` contains more complicated recurrence, some which the function cannot describe. since: 3.30
recur_describe_recurrence_ex	Describes some simple types of recurrences in a human-readable and localized way. The `flags` influence the output format and what to do when the `icalcomp` contains more complicated recurrence, some which the function cannot describe. since: 3.38
recur_ensure_end_dates	This recalculates the end dates for recurrence & exception rules which use the COUNT property. If `refresh` is `TRUE` it will recalculate all enddates for rules which use COUNT. If `refresh` is `FALSE`, it will only calculate the enddate if it hasn’t already been set. It returns `TRUE` if the component was changed, i.e. if the component should be saved at some point. We store the enddate in the `E_CAL_EVOLUTION_ENDDATE_PARAMETER` parameter of the RRULE or EXRULE. since: 2.32
recur_generate_instances_sync	Calls the given callback function for each occurrence of the event that intersects the range between the given `start` and `end` times (the end time is not included). Note that the occurrences may start before the given start time. since: 3.20
recur_get_localized_nth	since: 3.28
recur_obtain_enddate
system_timezone_get_location	Fetches the system timezone location string. since: 2.28
time_add_day	Adds a day onto the time, using local time. Note that if clocks go forward due to daylight savings time, there are some non-existent local times, so the hour may be changed to make it a valid time. This also means that it may not be wise to keep calling `time_add_day()` to step through a certain period - if the hour gets changed to make it valid time, any further calls to `time_add_day()` will also return this hour, which may not be what you want.
time_add_day_with_zone	Adds or subtracts a number of days to/from the given time_t value, using the given timezone. NOTE: this function is only here to make the transition to the timezone functions easier. New code should use ICalTime values and `i_cal_time_adjust()` to add or subtract days, hours, minutes & seconds.
time_add_month_with_zone	Adds or subtracts a number of months to/from the given time_t value, using the given timezone.
time_add_week	Adds the given number of weeks to a time value.
time_add_week_with_zone	Adds or subtracts a number of weeks to/from the given time_t value, using the given timezone. NOTE: this function is only here to make the transition to the timezone functions easier. New code should use ICalTime values and `i_cal_time_adjust()` to add or subtract days, hours, minutes & seconds.
time_day_begin	Returns the start of the day, according to the local time.
time_day_begin_with_zone	Returns the start of the day containing the given time_t, using the given timezone. NOTE: this function is only here to make the transition to the timezone functions easier. New code should use ICalTime values and `i_cal_time_adjust()` to add or subtract days, hours, minutes & seconds.
time_day_end	Returns the end of the day, according to the local time.
time_day_end_with_zone	Returns the end of the day containing the given time_t, using the given timezone. (The end of the day is the start of the next day.) NOTE: this function is only here to make the transition to the timezone functions easier. New code should use ICalTime values and `i_cal_time_adjust()` to add or subtract days, hours, minutes & seconds.
time_day_of_week	Returns the day of the week for the specified date, 0 (Sun) to 6 (Sat). For the days that were removed on the Gregorian reformation, it returns Thursday. Year is the normal year, e.g. 2001. Month is 0 to 11.
time_day_of_year	Returns the 1-based day number within the year of the specified date. Year is the normal year, e.g. 2001. Month is 0 to 11.
time_days_in_month	Returns the number of days in the month. Year is the normal year, e.g. 2001. Month is 0 (Jan) to 11 (Dec).
time_from_isodate	Converts an ISO 8601 UTC time string into a time_t value.
time_is_leap_year	Returns whether the specified year is a leap year. Year is the normal year, e.g. 2001.
time_leap_years_up_to	Returns the number of leap years since year 1 up to (but not including) the specified year. Year is the normal year, e.g. 2001.
time_month_begin_with_zone	Returns the start of the month containing the given time_t, using the given timezone. NOTE: this function is only here to make the transition to the timezone functions easier. New code should use ICalTime values and `i_cal_time_adjust()` to add or subtract days, hours, minutes & seconds.
time_to_gdate_with_zone	Converts a time_t value to a `GDate` structure using the specified timezone. This is analogous to `g_date_set_time()` but takes the timezone into account.
time_week_begin_with_zone	Returns the start of the week containing the given time_t, using the given timezone. week_start_day should use the same values as mktime(), i.e. 0 (Sun) to 6 (Sat). NOTE: this function is only here to make the transition to the timezone functions easier. New code should use ICalTime values and `i_cal_time_adjust()` to add or subtract days, hours, minutes & seconds.
time_year_begin_with_zone	Returns the start of the year containing the given time_t, using the given timezone. NOTE: this function is only here to make the transition to the timezone functions easier. New code should use ICalTime values and `i_cal_time_adjust()` to add or subtract days, hours, minutes & seconds.
util_add_timezones_from_component	Adds VTIMEZONE components to a VCALENDAR for all tzid’s in the given `icalcomp`.
util_clamp_vtimezone	Modifies the `vtimezone` to include only subcomponents influencing the passed-in time interval between `from` and `to`. since: 3.40
util_clamp_vtimezone_by_component	Similar to e_cal_util_clamp_vtimezone(), only reads the clamp times from the `component`. since: 3.40
util_component_dup_x_property	Searches for an X property named `x_name` within X properties of `icalcomp` and returns its value as a newly allocated string. Free it with g_free(), when no longer needed. since: 3.34
util_component_find_property_for_locale	Searches properties of kind `prop_kind` in the `icalcomp` and returns one, which is usable for the `locale`. When `locale` is `NULL`, the current locale is assumed. If no such property for the locale exists either the one with no language parameter or the first found is returned. since: 3.46
util_component_find_property_for_locale_filtered	Searches properties of kind `prop_kind` in the `icalcomp`, which can be filtered by the `func`, and returns one, which is usable for the `locale`. When `locale` is `NULL`, the current locale is assumed. If no such property for the locale exists either the one with no language parameter or the first found is returned. since: 3.52
util_component_find_x_property	Searches for an X property named `x_name` within X properties of `icalcomp` and returns it. Free the non-NULL object with g_object_unref(), when no longer needed. since: 3.34
util_component_get_recurid_as_string	since: 3.34
util_component_has_alarms	Checks whether an `ICalComponent` has any alarm.
util_component_has_attendee	Checks if an `ICalComponent` has any attendees.
util_component_has_organizer	Checks whether an `ICalComponent` has an organizer.
util_component_has_property	Returns, whether the `icalcomp` has a property of `prop_kind`. To check for a specific X property use e_cal_util_component_has_x_property(). since: 3.34
util_component_has_rdates	Checks if an `ICalComponent` has recurrence dates.
util_component_has_recurrences	Checks if an `ICalComponent` has recurrence dates or rules.
util_component_has_rrules	Checks if an `ICalComponent` has recurrence rules.
util_component_has_x_property	Returns, whether the `icalcomp` contains X property named `x_name`. To check for standard property use e_cal_util_component_has_property(). since: 3.34
util_component_is_instance	Checks whether an `ICalComponent` is an instance of a recurring appointment.
util_component_remove_property_by_kind	Removes all or only the first property of kind `kind` in `icalcomp`. since: 3.30
util_component_remove_x_property	Removes the first X property named `x_name` in `icalcomp`. since: 3.34
util_component_set_x_property	Sets a value of the first X property named `x_name` in `icalcomp`, if any such already exists, or adds a new property with this name and value. As a special case, if `value` is `NULL`, then removes the first X property named `x_name` from `icalcomp` instead. since: 3.34
util_conflict_resolution_to_operation_flags	Encodes the `EConflictResolution` into the bit-or of `ECalOperationFlags`. The returned value can be bit-or-ed with other `ECalOperationFlags` values. since: 3.34
util_construct_instance	This checks that `rid` indicates a valid recurrence of `icalcomp`, and if so, generates a copy of `icalcomp` containing a RECURRENCE-ID of `rid`.
util_copy_timezone	Copies the `zone` together with its inner component and returns it as a new `ICalTimezone` object. Free it with g_object_unref(), when no longer needed. since: 3.34
util_diff_categories	Compares list of categories on the `old_comp` with the list of categories on the `new_comp` and fills `out_added` categories and `out_removed` categories accordingly, as if the `old_comp` is replaced with the `new_comp`. When either of the components is `NULL`, it’s considered as having no categories set. Rather than returning empty `GHashTable`, the return argument is set to `NULL` when there are no added/removed categories. since: 3.48
util_email_addresses_equal	Compares two email addresses and returns whether they are equal. Each address can contain a “mailto:” prefix. The two addresses match only if they are non-NULL and non-empty. The address itself is compared case insensitively. since: 3.50
util_foreach_category	Calls `func` for each category stored in the `comp`. since: 3.48
util_generate_alarms_for_comp	Generates alarm instances for a calendar component. Returns the instances structure, or `NULL` if no alarm instances occurred in the specified time range. Free the returned structure with e_cal_component_alarms_free(), when no longer needed.
util_generate_alarms_for_list	Iterates through all the components in the `comps` list and generates alarm instances for them; putting them in the `comp_alarms` list. Free the `comp_alarms` with g_slist_free_full (comp_alarms, e_cal_component_alarms_free);, when no longer neeed.
util_generate_alarms_for_uid_sync	Generates alarm instances for a calendar component with UID `uid`, which is stored within the `client`. In contrast to e_cal_util_generate_alarms_for_comp(), this function handles detached instances of recurring events properly. since: 3.48
util_get_attendee_email	Returns an attendee email, without the “mailto:” prefix, if the `attendee` has it set. The email can be read from an “EMAIL” parameter, if present. since: 3.50
util_get_component_occur_times	Find out when the component starts and stops, being careful about recurrences. since: 2.32
util_get_default_name_and_address	Returns the real name and email address of the default mail identity, if available. If no default mail identity is available, `out_name` and `out_address` are set to `NULL` and the function returns `FALSE`. since: 3.50
util_get_organizer_email	Returns an organizer email, without the “mailto:” prefix, if the `organizer` has it set. The email can be read from an “EMAIL” parameter, if present. since: 3.50
util_get_property_email	Returns an `prop` email, without the “mailto:” prefix, if the `prop` has it set. The email can be read from an “EMAIL” parameter, if present. Otherwise the `prop` can be only of type `I_CAL_ORGANIZER_PROPERTY` or `I_CAL_ATTENDEE_PROPERTY`. since: 3.50
util_get_system_timezone	Fetches system timezone ICalTimezone object. since: 2.28
util_get_system_timezone_location	Fetches system timezone localtion string. since: 2.28
util_has_alarms_in_range	Checks whether the `comp` has any alarms in the given time interval. since: 3.48
util_icaltime_to_tm	Converts an `ICalTime` into a GLibc’s struct tm. since: 2.22
util_icaltime_to_tm_with_zone	Converts a time value from one timezone to another, and returns a struct tm representation of the time. since: 2.22
util_init_recur_task_sync	Initializes properties of a recurring `vtodo`, like normalizing the Due date and eventually the Start date. The function does nothing when the `vtodo` is not recurring. since: 3.30
util_inline_local_attachments_sync	Changes all URL attachments which point to a local file in `component` to inline attachments, aka adds the file content into the `component`. It also populates FILENAME parameter on the attachment. since: 3.40
util_is_first_instance	Returns whether the given `rid` is the first instance of the recurrence defined in the `comp`. since: 3.16
util_mark_task_complete_sync	Marks the `vtodo` as complete with eventual update of other properties. This is useful also for recurring tasks, for which it moves the `vtodo` into the next occurrence according to the recurrence rule. since: 3.30
util_new_component	Creates a new `ICalComponent` of the specified kind. Free it with g_object_unref(), when no longer needed.
util_new_top_level	Creates a new VCALENDAR component. Free it with g_object_unref(), when no longer needed.
util_normalize_rrule_until_value	Makes sure the `ttuntil` value matches the value type with the DTSTART value, as required by RFC 5545 section 3.3.10. Uses `tz_cb` with `tz_cb_data` to resolve time zones when needed. since: 3.38
util_operation_flags_to_conflict_resolution	Decodes the `EConflictResolution` from the bit-or of `ECalOperationFlags`. since: 3.34
util_parse_ics_file	Parses the given file, and, if it contains a valid iCalendar object, parse it and return a new `ICalComponent`.
util_parse_ics_string	Parses an iCalendar string and returns a new `ICalComponent` representing that string. Note that this function deals with multiple VCALENDAR’s in the string, something that Mozilla used to do and which libical does not support.
util_priority_from_string	Converts a translated priority string to an iCalendar priority value.
util_priority_to_string	Converts an iCalendar PRIORITY value to a translated string. Any unknown priority value (i.e. not 0-9) will be returned as “” (undefined).
util_property_has_parameter	Returns, whether the `prop` has a parameter of `param_kind`. since: 3.34
util_remove_instances	Removes one or more instances from `icalcomp` according to `rid` and `mod`. deprecated: 3.38
util_remove_instances_ex	Removes one or more instances from `icalcomp` according to `rid` and `mod`. Uses `tz_cb` with `tz_cb_data` to resolve time zones when needed. since: 3.38
util_seconds_to_string	Converts time, in seconds, into a string representation readable by humans and localized into the current locale. This can be used to convert event duration to string or similar use cases. since: 3.30
util_set_alarm_acknowledged	Sets the ACKNOWLEDGED property on the `component`‘s alarm with UID `auid` to the time `when` (in UTC), or to the current time, when the `when` is 0. since: 3.40
util_split_at_instance	Splits a recurring `icalcomp` into two at time `rid`. The returned `ICalComponent` is modified `icalcomp` which contains recurrences beginning at `rid`, inclusive. The instance identified by `rid` should exist. The `master_dtstart` can be a null time, then it is read from the `icalcomp`. deprecated: 3.38 since: 3.16
util_split_at_instance_ex	Splits a recurring `icalcomp` into two at time `rid`. The returned `ICalComponent` is modified `icalcomp` which contains recurrences beginning at `rid`, inclusive. The instance identified by `rid` should exist. The `master_dtstart` can be a null time, then it is read from the `icalcomp`. since: 3.38
util_strip_mailto	Strips “mailto:” prefix from the `address`, if present. The returned pointer is either the `address` or a shifted position within the `address`. since: 3.50
util_tm_to_icaltime	Converts a struct tm into an `ICalTime`. Free the returned object with g_object_unref(), when no longer needed. since: 2.22

Constants

BACKEND_PROPERTY_ALARM_EMAIL_ADDRESS	An email address preferred for e-mail reminders by the calendar.
BACKEND_PROPERTY_CAL_EMAIL_ADDRESS	An email address associated with the calendar.
BACKEND_PROPERTY_DEFAULT_OBJECT	A default object for the calendar. Calendars use VEVENT, memo lists VJOURNAL and task lists VTODO, which can have prefilled values by the backend.
BACKEND_PROPERTY_REVISION	The current overall revision string, this can be used as a quick check to see if data has changed at all since the last time the calendar revision was observed.
EVOLUTION_ALARM_UID_PROPERTY	Extension property for alarm components so that we can reference them by UID.
EVOLUTION_ENDDATE_PARAMETER	The X parameter name being used to store the enddate in RRULE and EXRULE properties.
LIBICAL_GLIB_UNSTABLE_API
STATIC_CAPABILITY_ALARM_DESCRIPTION	Flag indicating that the backend supports alarm description.
STATIC_CAPABILITY_ALL_DAY_EVENT_AS_TIME	Let the client know that it should store All Day event times as time with a time zone, rather than as a date.
STATIC_CAPABILITY_BULK_ADDS	Flag indicating that the backend supports bulk additions.
STATIC_CAPABILITY_BULK_MODIFIES	Flag indicating that the backend supports bulk modifications.
STATIC_CAPABILITY_BULK_REMOVES	Flag indicating that the backend supports bulk removals.
STATIC_CAPABILITY_COMPONENT_COLOR	When the capability is set, the client supports storing color for individual components.
STATIC_CAPABILITY_CREATE_MESSAGES
STATIC_CAPABILITY_DELEGATE_SUPPORTED
STATIC_CAPABILITY_DELEGATE_TO_MANY
STATIC_CAPABILITY_HAS_UNACCEPTED_MEETING
STATIC_CAPABILITY_ITIP_SUPPRESS_ON_REMOVE_SUPPORTED	Set, when the backend supports `E_CAL_STATIC_CAPABILITY_SAVE_SCHEDULES` and it can suppress iTip message on component removal. The capability should be ignored when the `E_CAL_STATIC_CAPABILITY_SAVE_SCHEDULES` is not present.
STATIC_CAPABILITY_NO_ALARM_AFTER_START	Flag indicating that the backend does not support alarm after start the event.
STATIC_CAPABILITY_NO_ALARM_REPEAT
STATIC_CAPABILITY_NO_AUDIO_ALARMS
STATIC_CAPABILITY_NO_CONV_TO_ASSIGN_TASK
STATIC_CAPABILITY_NO_CONV_TO_RECUR
STATIC_CAPABILITY_NO_DISPLAY_ALARMS
STATIC_CAPABILITY_NO_EMAIL_ALARMS
STATIC_CAPABILITY_NO_GEN_OPTIONS
STATIC_CAPABILITY_NO_MEMO_START_DATE
STATIC_CAPABILITY_NO_ORGANIZER
STATIC_CAPABILITY_NO_PROCEDURE_ALARMS
STATIC_CAPABILITY_NO_TASK_ASSIGNMENT
STATIC_CAPABILITY_NO_THISANDFUTURE
STATIC_CAPABILITY_NO_THISANDPRIOR
STATIC_CAPABILITY_NO_TRANSPARENCY
STATIC_CAPABILITY_ONE_ALARM_ONLY
STATIC_CAPABILITY_ORGANIZER_MUST_ACCEPT
STATIC_CAPABILITY_ORGANIZER_MUST_ATTEND
STATIC_CAPABILITY_ORGANIZER_NOT_EMAIL_ADDRESS
STATIC_CAPABILITY_RECURRENCES_NO_MASTER
STATIC_CAPABILITY_REFRESH_SUPPORTED
STATIC_CAPABILITY_REMOVE_ALARMS
STATIC_CAPABILITY_REMOVE_ONLY_THIS
STATIC_CAPABILITY_REQ_SEND_OPTIONS
STATIC_CAPABILITY_RETRACT_SUPPORTED	Set, when the backend supports retract. That’s a way to ask for a meeting deletion with a comment, which is stored in a component as the COMMENT property.
STATIC_CAPABILITY_SAVE_SCHEDULES
STATIC_CAPABILITY_SIMPLE_MEMO	When the capability is set, the backend handles only simple memos, which means it stores only memo description. The summary can be changed by the backend, if needed.
STATIC_CAPABILITY_SIMPLE_MEMO_WITH_SUMMARY	Similar to the `E_CAL_STATIC_CAPABILITY_SIMPLE_MEMO`, except the backend stores the description and the summary separately.
STATIC_CAPABILITY_TASK_CAN_RECUR	When the capability is set, the client can store and provide recurring tasks, otherwise it cannot.
STATIC_CAPABILITY_TASK_DATE_ONLY	Let the client know that the Task Start date, Due date and Completed date can be entered only as dates. When the capability is not set, then these can be date and time.
STATIC_CAPABILITY_TASK_ESTIMATED_DURATION	Set, when the backend supports ESTIMATED-DURATION property for tasks.
STATIC_CAPABILITY_TASK_HANDLE_RECUR	When the capability is set, the backend handles task recurrence completion on its own. This does not imply E_CAL_STATIC_CAPABILITY_TASK_CAN_RECUR.
STATIC_CAPABILITY_TASK_NO_ALARM	When the capability is set, the client cannot store reminders on tasks, otherwise it can.