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manual:appendix:api:event:definitions
> Event object
The following objects are directly related to the event API.
Event
Events are created by the Zabbix server and cannot be modified via the API.
The event object has the following properties.
| Property | Type | Description |
|---|---|---|
| eventid | string | ID of the event. |
| acknowledged | integer | Whether the event has been acknowledged. |
| clock | timestamp | Time when the event was created. |
| ns | integer | Nanoseconds when the event was created. |
| object | integer | Type of object that is related to the event. Possible values for trigger events: 0 - trigger. Possible values for discovery events: 1 - discovered host; 2 - discovered service. Possible values for auto-registration events: 3 - auto-registered host. |
| objectid | string | ID of the related object. |
| source | integer | Type of the event. Possible values: 0 - event created by a trigger; 1 - event created by a discovery rule; 2 - event created by active agent auto-registration. |
| value | integer | State of the related object. Possible values for trigger events: 0 - OK; 1 - problem; 2 - unknown. Possible values for discovery events: 0 - host or service up; 1 - host or service down; 2 - host or service discovered; 3 - host or service lost. This parameter is not used for active agent auto-registration events. |
| value_changed | integer | Whether the state of the related object has changed since the previous event. |