Events and related objects

Events can be planned or unplanned, and the start and end times might be recorded.

Event types can be as accidents, festivals, explosions, or a rally. In addition to the base information about an event, more detailed information can be recorded, such as the following examples.

Events can contain arbitrary payload information (EVENT_PAYLOAD) that was collected about the event.
Events might have relationships with other events (EVENT_RELATIONSHIP), for example, a fire might take place at a festival.
Similar to Party objects, an Event might have arbitrary properties. These properties are keyword and value pairs (EVENT_PROPERTY) that can contain other information about the event that is not supported by the existing table structure.