| An ActivityDescription is not the activity itself, but its description for the purposes of, eg., planning. Can describe primitive activities, or complex activities which are themselves composed of activities. |
| •owl:Thing |
| •SpatioTemporalThing |
| •Endurant |
| •NonPhysicalEndurant |
| •SocialObject |
| •NonAgentiveSocialObject |
| •Concept |
| •PlanElement |
| •ActivityDescription |