Skip to main content

Table 2 Features applied as parameters of the CRF. Applied features which are used as parameters of the CRF are ordered by their classes, corresponding feature examples and explanations are given.

From: Identification of histone modifications in biomedical text for supporting epigenomic research

Name Explanation
Static morphol. features Reg.Ex.
All Caps [A-Z]+
Natural Number [0–9]+
Alpha-Num [A-Za-z0–9]+
Autom. generated morphol. features  
Autom. Prefixes/Suffixes Autom. generation of a feature for every token: match that prefix or suffix
WordsAsClass Autom. generation of a feature for every token: match that token
Context  
Spaces Is a token preceded or succeeded by white space
In Brackets Is a token pre-ceded or succeeded by brackets