The units of information used by a Machine Learning Algorithm to Classify or Prioritize Documents. Typical Features include text fragments such as words or phrases, and metadata such as sender, recipient, and sent date. See also Feature Engineering. 1


  1. Maura R. Grossman and Gordon V. Cormack, EDRM page & The Grossman-Cormack Glossary of Technology-Assisted Review, with Foreword by John M. Facciola, U.S. Magistrate Judge2013 Fed. Cts. L. Rev. 7 (January 2013).