You can view format of an alarm through API.

The format of an alarm contains the following information.

Event ID and Time
Severity: Possible values include informational, low, medium, major, critical, high.  
Event Source: Source where you should look to resolve the reported event.
Event Code: Unique identifier for the event. 
Message: Text containing detailed information about the event.
Alarm ID: ID of an alarm.
Alarm Code: Event code which uniquely identifies the system alarm. 
Alarm Source: Source where you should look to resolve the reported event.