| •owl:Thing |
| •amo:Object |
| •amo:Feature |
| •amo:MarineFeature |
| •amo:MarinePoint |
| •amo:MeasurementPoint |
| •amo:InstantaneousPoint |
| •amo:Instant |
| •oilspills:OilSpillCause |
| •oilspills:ExternalFactor |
Class(oilspills:ExternalFactor partial oilspills:OilSpillCause)
DisjointClasses(oilspills:ExternalFactor oilspills:NaturalCause
oilspills:Explosion
oilspills:StructuralCause
oilspills:Accident
oilspills:HumainFactor)