Errator: a Tool to Help Detect Annotation Errors in the Universal Dependencies Project

Enforcing guidelines compliance is today one of the main challenge faced by the Universal Dependencies project.This work introduces ERRATOR, a set of tools implementing the annotation variation principle that can be used to help annotators find and correct errors in the different layers of annotations of UD treebanks.The results of a first annotation campaign that used ERRATOR to correct and harmonize the annotations of the different French corpora are also described.