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 |