| Interface Summary |
| Birth | Being's birth Reference Implementation. |
| Durable | Something that last for some time. |
| Employment | |
| Endable | Something that have a unique start time (and optionnaly end time). |
| Event | An Event of interest, such as an ufological event (Sighting, InvestigationAct, etc.)
or a more common one (Employment, Birth, etc.).
An event can be considered as sentence stating what happened.
|
| FriendshipRelationship | |
| LiveWithRelationship | |
| Relationship | An event involving a interaction between two actors. |
| Sighting | The event for a people sighting something (multiple witnesses imply multiple sightings).
|
| Timeable | |
| TimeLine |
A chronologicaly ordered collection of events,
with an acceptable interval of time between events.
|
| WorkWithRelationship | |