The Book Interchange Tag Suite (BITS) version 2.1 contains an XML model for STM books that is based on the Journal Article Tag Suite (JATS; ANSI/NISO Z39-96-2015) version 1.3. The intent of the BITS is to provide a common format in which publishers and archives can exchange book content, including book parts such as chapters. The Suite provides a set of XML schema modules that define elements and attributes for describing the textual and graphical content of books and book components as well as a package for book part interchange.



Complete documentation for the Tag Set is available in Tag Library. Each version has its own Tag Library that documents the rules and usage for that version. The Tag Library for the most recent release of this Tag Set will always be available at the following URI:

The structure and suggested usage of the Tag Library is described in the How to Use (Read Me First) section of each Tag Library.

Available Schemas

The models and constraints in this Tag Set are encoded in several schema languages:

  • DTD,
  • RELAX NG (RNG), and
  • W3C XML Schema (XSD).

These schemas are, to the extent possible, equivalent, and there is no preference for which is used.

Please see the individual Tag Set version for links to that version's schemas.

Getting the files

All of the schema files are available by anonymous FTP:

Each schema is also available at a stable URI. Please see the indiviual Tag Set version for those URIs.


We welcome comments on the Tag Suite. Please use the JATS Discussion List for comments on the BITS extension.

JATS Discussion List

The JATS-List, hosted by Mulberry Technologies, Inc., is a mailing list for open discussion of the Journal Article Tag Suite. For more information about the list, visit