MITRE Annotation Toolkit

The MITRE Annotation Toolkit (MAT) is a suite of tools which can be used for automated and human tagging of annotations.

Annotation is a process, used mostly by researchers in natural language processing, of enhancing documents with information about the various phrase types the documents contain.

MAT supports both UI interaction and command-line interaction, and provides various levels of control over the overall annotation process. It can be customized for specific tasks (e.g., named entity identification, de-identification of medical records). The goal of MAT is not to help you configure your training engine (in the default case, the Carafe CRF system) to achieve the best possible performance on your data. MAT is for "everything else": all the tools you end up wishing you had.