!!!ERRANT
ERRor Annotation Toolkit
https://github.com/chrisjbryant/errant
Bryant et al, 2017; Felice et al., 2016
https://github.com/chrisjbryant/errant

元の文と訂正文がパラレルにあれば、これで、どこがどう訂正されたか（Detection and Correction）、自動で出してくれる。


!!online demo
https://nlptoolbox.cl.cam.ac.uk/errant/


!!25 main error categories
!!M2 format
{{pre
S This are gramamtical sentence .
A 1 2|||R:VERB:SVA|||is|||REQUIRED|||-NONE-|||0
A 2 2|||M:DET|||a|||REQUIRED|||-NONE-|||0
A 2 3|||R:SPELL|||grammatical|||REQUIRED|||-NONE-|||0
A -1 -1|||noop|||-NONE-|||REQUIRED|||-NONE-|||1
}}

*a line preceded by S denotes an original sentence
*a line preceded by A indicates an edit annotation
**Each edit line consists of the start and end token offset of 
***the edit, 
***the error type, and 
***the tokenized correction string
*The next two fields are included for historical reasons 
**(see the CoNLL-2014 shared task) 
**while the last field is the annotator id