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Metrics of ontology-based knowledge base prototype on cystic fibrosis content summary [9].
| Name | Count (n) |
| Axiom | 1375 |
| Logical axiom | 665 |
| Declaration axiom | 445 |
| Class | 408 |
| Individual | 0 |
| Object property | 35 |
| SubClassOf | 498 |
| EquivalentClasses | 113 |
| DisjointClasses | 37 |
| Maximum depth | 9 |
| Maximum number of children | 20 |
| Average number of children | 3 |
| Classes with a single child | 69 |
| AnnotationAssertion | 265 |
