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Table 11 Top areas of 11 hierarchies in NCIt (15.02d release)

From: Missing lateral relationships in top-level concepts of an ontology

Hierarchy # concepts # concepts in top area %
Activity 10,633 10,087 94.9
Anatomic Structure, System, or Substance 6747 1730 25.6
Biological Process 1145 513 44.8
Chemotherapy Regimen or Agent Combination 3419 41 1.2
Conceptual Entity 12,409 8851 71.3
Disease, Disorder or Finding 25,360 14,347 56.6
Drug, Food, Chemical or Biomedical Material 17,681 16,139 91.3
Experimental Organism Diagnosis 1701 327 19.2
Gene 8914 395 4.4
Gene Product 5256 90 1.7
Molecular Abnormality 1244 192 15.4