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# Maintenance object
The following objects are directly related to the `maintenance` API.
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### Maintenance
The maintenance object has the following properties.
|Property|[Type](/manual/api/reference_commentary#data_types)|Description|
|--|--|------|
|maintenanceid|string|*(readonly)* ID of the maintenance.|
|**name**
(required)|string|Name of the maintenance.|
|**active\_since**
(required)|timestamp|Time when the maintenance becomes active.
The given value will be rounded down to minutes.|
|**active\_till**
(required)|timestamp|Time when the maintenance stops being active.
The given value will be rounded down to minutes.|
|description|string|Description of the maintenance.|
|maintenance\_type|integer|Type of maintenance.
Possible values:
0 - *(default)* with data collection;
1 - without data collection.|
|tags\_evaltype|integer|Problem tag evaluation method.
Possible values:
0 - *(default)* And/Or;
2 - Or.|
Note that for some methods (update, delete) the required/optional parameter combination is different.
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### Time period
The time period object is used to define periods when the maintenance
must come into effect. It has the following properties.
|Property|[Type](/manual/api/reference_commentary#data_types)|Description|
|--|--|------|
|period|integer|Duration of the maintenance period in seconds.
The given value will be rounded down to minutes.
Default: 3600.|
|timeperiod\_type|integer|Type of time period.
Possible values:
0 - *(default)* one time only;
2 - daily;
3 - weekly;
4 - monthly.|
|start\_date|timestamp|Date when the maintenance period must come into effect.
Used only for one time periods.
The given value will be rounded down to minutes.
Default: current date.|
|start\_time|integer|Time of day when the maintenance starts in seconds.
Used for daily, weekly and monthly periods.
The given value will be rounded down to minutes.
Default: 0.|
|every|integer|Used for daily, weekly and monthly periods.
For daily and weekly periods `every` defines day or week intervals at which the maintenance must come into effect.
Default: 1.
For monthly periods, if `dayofweek` property contains at least one selected day of week, the `every` property defines the week of the month when the maintenance must come into effect.
Possible values:
1 - *(default)* first week;
2 - second week;
3 - third week;
4 - fourth week;
5 - last week.|
|dayofweek|integer|Days of the week when the maintenance must come into effect.
Possible bitmap values are:
1 - Monday;
2 - Tuesday;
4 - Wednesday;
8 - Thursday;
16 - Friday;
32 - Saturday;
64 - Sunday.
This is a bitmask field; any sum of possible bitmap values is acceptable (for example, 21 for Monday, Wednesday, and Friday).
Used for weekly and monthly time periods. Required only for weekly time periods.
At least one `dayofweek` or `day` must be specified for monthly time periods.|
|day|integer|Day of the month when the maintenance must come into effect.
Used only for monthly time periods.
At least one `dayofweek` or `day` must be specified for monthly time periods.|
|month|integer|Months when the maintenance must come into effect.
Possible bitmap values are:
1 - January;
2 - February;
4 - March;
8 - April;
16 - May;
32 - June;
64 - July;
128 - August;
256 - September;
512 - October;
1024 - November;
2048 - December.
This is a bitmask field; any sum of possible bitmap values is acceptable (for example, 585 for January, April, July, and October).
Required only for monthly time periods.|
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### Problem tag
The problem tag object is used to define which problems must be
suppressed when the maintenance comes into effect. It has the following
properties.
|Property|[Type](/manual/api/reference_commentary#data_types)|Description|
|--|--|------|
|**tag**
(required)|string|Problem tag name.|
|operator|integer|Condition operator.
Possible values:
0 - Equals;
2 - *(default)* Contains.|
|value|string|Problem tag value.|
Tags can only be specified for maintenance periods with data collection (`"maintenance_type":0`).
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