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Table 1 The details of the gold standard patent corpora containing the annotations for chemicals

From: Recognizing chemicals in patents: a comparative analysis

Corpus Number of patents Annotated entities Number of annotations
CEMP training set (CEMP_T) [11, 25] \(\approx\)660 thousand token 7000 patents (title and abstract) ABBREVIATION, FAMILY, FORMULA, TRIVIAL, MULTIPLE, SYSTEMATIC, IDENTIFIERS 33543 (without normalization)
CEMP development set (CEMP_D) [11, 25] \(\approx\)650 thousand token 7000 patents (title and abstract) ABBREVIATION, FAMILY, FORMULA, TRIVIAL, MULTIPLE, SYSTEMATIC, IDENTIFIERS 32142 (without normalization)
CHEBI patent corpus (chapati) [18] \(\approx\)265 thousand token 40 full patents (title, abstract, claims, description) CLASS, CHEMICAL, ONT, FORMULA, LIGAND, CM 18746 (normalized to CHEBI identifiers)
BioSemantic patent corpus (BioS) [19] 11,500 pages and \(\approx\)4.2 million token 200 full patents (title, abstract, claims, description) IUPAC, SMILES, InChi, ABBREVIATION, MOA, DISEASE, FORMULA, REGISTRY NUMBER, GENERIC, TRADEMARK, CAS NUMBER, TARGET 400125 (without normalization)