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Table 9 No. of classes and effort involved in the production of a number of manually curated ontologies.

From: Issues in learning an ontology from text

Ontology No. of classes Subsumption axioms Duration Effort in hours
ABO 305 303 3 years 800
Normalisation of CTO 1110 2823 8 months 444
EFO 1420 1873 1 year 1440
InfluenzO 269 223 2.5 years 2900
BioPAX L1 28 67 2.5 years 9900
OBI 1366 2016 3 years 14,296
GO 26894   10 years > 160 000
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