Issues in learning an ontology from text

BMC Bioinformatics

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

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

ISSN: 1471-2105