Table 2.
Families for ontologies that have object properties (relationships)
| Family | Structural Condition | # Ontologies | Samples |
|---|---|---|---|
| 1 | All relationships instantiated | 2 | SNOMED CT, NCIt |
| 2 | With only domain-defined object properties | 19 | Cancer Chemoprevention Ontology (CanCo) International Classification of Functioning, Disability and Health (ICF) Physical Medicine and Rehabilitation (PMR) |
| 3 | With only restriction-defined object properties | 69 | Gene Ontology (GO) Cereal Plant Development (GRO_CPD) Host Pathogen Interactions Ontology (HPIO) |
| 4 | With either domain-defined object properties or restriction-defined object properties | 62 | Sleep Domain Ontology (SDO) Infectious Disease Ontology (IDO) |