NCBO Ontology Recommender 2.0: an enhanced approach for biomedical ontology recommendation

Table 8 Summary of evaluation results for keyword inputs

Database	Mean length^a	Executions with coverage < 20%^b		Mean coverage (top ranked ontology)^c			Execution time (seconds)
		1.0*	2.0**	1.0*	2.0**	2.0 (sets)***	1.0*	2.0**	2.0 (sets)***
AERS	29.5	6.0%	0.0%	54.6%	97.8%	99.6%	10.2	9.1	10.5
AGDB	8.2	5.0%	0.0%	53.4%	67.5%	82.9%	6.5	9.9	10.9
CT	16.6	12.0%	2.0%	61.4%	76.5%	84.8%	9.9	8.4	10.2
DBK	5.9	13.0%	1.0%	60.5%	74.7%	89.6%	4.3	6.8	7.3
PGGE	15.4	2.0%	0.0%	73.1%	80.5%	83.0%	9.9	9.1	10.3
UPKB	29.9	18.0%	0.0%	74.6%	96.3%	99.1%	16.5	13.1	16.9
Mean	17.6	9.3%	0.5%	62.9%	82.2%	89.8%	9.5	9.4	11.0

^aMean of the number of words for the inputs extracted from the database
^bPercentage of executions where the coverage of the top recommended ontology was lower than 20%
^cMean coverage provided by the top ranked ontology
*Ontology Recommender 1.0; **Ontology Recommender 2.0; ***Ontology Recommender 2.0 (ontology sets output)

ISSN: 2041-1480