What are extracted features?

The HTRC Extracted Features Dataset v.2.0 is composed of page-level features for 17.1 million volumes in the HathiTrust Digital Library. This version contains non-consumptive features for both public-domain and in-copyright books.

A full explanation of the dataset’s features, motivation, and creation is available at the EF Dataset documentation page.

Extracted features data model

Extracted features files are JSON files that contain bibliographic meatdata for each volume such as title, author, place of publication, etc. The files also contain page-level feature data such as part-of-speech tagged term token counts, header/footer identification, marginal character counts, and much more.