SPASE Ontology

The SPASE ontology can be expressed in many forms. One of those forms is with OWL.

Space Physics Archive Search and Extract (SPASE) Ontology

Virtual Observatory Specific Ontologies

Virtual Heliospheric Observatory Ontology (Heliospheric instances of the SPASE ontology)
Virtual Magnetospheric Observatory Ontology (Magnetospheric instances of the SPASE ontology)