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# > Objeto de trigger
Os objetos a seguir estão diretamente relacionados à API `trigger`.
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### Trigger
The trigger object has the following properties.
|Property|[Type](/manual/api/reference_commentary#data_types)|Description|
|--------|---------------------------------------------------|-----------|
|triggerid|string|*(readonly)* ID of the trigger.|
|**description**
(required)|string|Name of the trigger.|
|**expression**
(required)|string|Reduced trigger expression.|
|event\_name|string|Event name generated by the trigger.|
|opdata|string|Operational data.|
|comments|string|Additional description of the trigger.|
|error|string|*(readonly)* Error text if there have been any problems when updating the state of the trigger.|
|flags|integer|*(readonly)* Origin of the trigger.
Possible values are:
0 - *(default)* a plain trigger;
4 - a discovered trigger.|
|lastchange|timestamp|*(readonly)* Time when the trigger last changed its state.|
|priority|integer|Severity of the trigger.
Possible values are:
0 - *(default)* not classified;
1 - information;
2 - warning;
3 - average;
4 - high;
5 - disaster.|
|state|integer|*(readonly)* State of the trigger.
Possible values:
0 - *(default)* trigger state is up to date;
1 - current trigger state is unknown.|
|status|integer|Whether the trigger is enabled or disabled.
Possible values are:
0 - *(default)* enabled;
1 - disabled.|
|templateid|string|*(readonly)* ID of the parent template trigger.|
|type|integer|Whether the trigger can generate multiple problem events.
Possible values are:
0 - *(default)* do not generate multiple events;
1 - generate multiple events.|
|url|string|URL associated with the trigger.|
|value|integer|*(readonly)* Whether the trigger is in OK or problem state.
Possible values are:
0 - *(default)* OK;
1 - problem.|
|recovery\_mode|integer|OK event generation mode.
Possible values are:
0 - *(default)* Expression;
1 - Recovery expression;
2 - None.|
|recovery\_expression|string|Reduced trigger recovery expression.|
|correlation\_mode|integer|OK event closes.
Possible values are:
0 - *(default)* All problems;
1 - All problems if tag values match.|
|correlation\_tag|string|Tag for matching.|
|manual\_close|integer|Allow manual close.
Possible values are:
0 - *(default)* No;
1 - Yes.|
|uuid|string|Universal unique identifier, used for linking imported triggers to already existing ones. Used only for triggers on templates. Auto-generated, if not given.
For update operations this field is *readonly*.|
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### Etiqueta de trigger
O objeto da etiqueta de trigger tem as seguintes propriedades..
|Propriedade|[Type](/manual/api/reference_commentary#data_types)|Descrição|
|--|--|------|
|**tag**
(requerido)|string|Nome da etiqueta de trigger.|
|value|string|Valor da tag etiqueta de trigger.|
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