ChemTok: A New Rule Based Tokenizer for Chemical Named Entity Recognition

Table 7

NER performance (-score in %) of classifiers using DrugBank and Medline corpora of DDI SemEval data set.

Data set	Tokenizer	Classification algorithm
		CRF	SVM
DrugBank	White space	77.89	82.85
	ChemSpot	87.16	89.10
	tmVar	84.74	90.34
	ChemTok	88.65	91.79
Medline	White space	51.51	42.41
	ChemSpot	62.72	67.48
	tmVar	62.04	67.50
	ChemTok	64.88	68.51