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Table 1 examples of knowledge coded with OWL in OntoStar

From: Harnessing ontology and machine learning for RSO classification

Knowledge type


Concept hierarchy

LargeDebris SubClassOf Debris

Debris SubClassOf SpaceObject

Rocket SubClassOf SpaceObject

Satellite SubClassOf SpaceObject

Disjoint Class (Debris Rocket Satellite)

Internal knowledge

LargeDebris≡Debris and (size only xsd:float[>0.1f])

Contextual knowledge of concepts

SpaceObject SubClassOf (inOrbit exactly 1 Orbit)

HEO≡Orbit and altitude only xsd:float[>=36000.0f]

Orbit SubClassOf (inclination exactly 1 xsd:float[>=0f,<180])