We introduce the brat rapid annotation tool (BRAT), an intuitive web-based tool for text annotation supported by Natural Language Processing (NLP) technology. BRAT has been developed for rich structured annotation for a variety of NLP tasks and aims to support manual curation efforts and increase annotator productivity using NLP techniques. We discuss several case studies of real-world annotation projects using pre-release versions of BRAT and present an evaluation of annotation assisted by semantic class disambiguation on a multicategory entity mention annotation task, showing a 15% decrease in total annotation time. BRAT is available under an opensource license from: http://brat.nlplab.org
The most prominent and popular is brat: rapid annotation tool (brat) REF , a web-based general purpose annotation tool capable of a handling a wide variety of annotation tasks, including span annotations, and relations between spans.
brat: a Web-based Tool for NLP-Assisted Text Annotation
EACL
Computer Science