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Table 2 Comparison between AMA and NCI-A

From: Experiences from the anatomy track in the ontology alignment evaluation initiative

  AMA NCI-A
# of concepts 2744 3304
# of direct subconcepts of owl:Thing 1056 7
Maximum depth of the is-a hierarchy 9 13
# equivalent concepts 0 0
# of inner concepts 483 674
# of leaf concepts 2261 2631
Maximum number of direct subconcepts 129 125
# of concepts with one subconcept 74 125
# of concepts with multiple superconcepts 110 277
Average leaves depth   
(= (sum leaf concepts depth)/(# leaf concepts)): 3 6
Average depth (= (sum concepts depth)/(# concepts)): 3 6
Average number of subconcepts (only concepts with subconcepts): 5 5
Average number of subconcepts (all concepts): 1 1