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Submission Request to W3C: EPUB 3.1

Submitted Materials

We, W3C Member International Digital Publishing Forum (IDPF), together with other W3C Members and additional contributors listed below, submit to the Consortium the following specification, comprising the following document(s) attached hereto:

  1. The EPUB 3.1 specification.
  2. EPUB Packages 3.1
  3. EPUB Content Documents 3.1
  4. EPUB Media Overlays 3.1
  5. EPUB Open Container Format (OCF) 3.1
  6. EPUB Accessibility
  7. Alternate Style Tags

which collectively are referred to as "the Submission". We request the Submission be known as the EPUB 3.1 Submission.


The EPUB 3.1 specification defines a distribution and interchange format for digital publications and documents. The EPUB® format provides a means of representing, packaging and encoding structured and semantically enhanced Web content — including HTML, CSS, SVG and other resources — for distribution in a single-file container.

The EPUB 3.1 standard is modular in nature, with core features and functionality defined across a family of sub-specifications.

This specification represents the top-most specification in the family. It includes the conformance requirements for both EPUB Publications (the product of the standard) and EPUB Reading Systems (the applications that consume EPUB Publications and present their content to users).

The other specifications that comprise EPUB 3.1 are as follows:

·        EPUB Packages 3.1 — defines requirements for each Rendition of the content.

·        EPUB Content Documents 3.1 — defines profiles of XHTML, SVG and CSS for use in the context of EPUB Publications.

·        EPUB Media Overlays 3.1 — defines a format and a processing model for synchronization of text and audio.

·        EPUB Open Container Format (OCF) 3.1 — defines a file format and processing model for encapsulating a set of related resources into a single-file (ZIP) EPUB Container.

·        EPUB Accessibility — defines accessibility conformance and discovery metadata requirements for EPUB Publications.

·        Alternate Style Tags — defines a pattern for tagging alternate style sheets using microformats.

Intellectual Property Statements

The below statements concerning Copyrights, Trade and Service Marks, and Patents, have been made by the following authorized representatives on behalf of themselves and their affiliated organizations:

W3C Members

Additional Contributors


Each organization, respectively, hereby grants to the W3C a perpetual, nonexclusive, royalty-free, world-wide right and license under any its copyrights on this contribution, to copy, publish and distribute the contribution under the W3C document licenses.

Additionally, should the Submission be used as a contribution towards a W3C Activity, each organization grants a right and license of the same scope to any derivative works prepared by the W3C and based on, or incorporating all or part of, the contribution. Each organization further agrees that any derivative works of this contribution prepared by the W3C shall be solely owned by the W3C.


Each organization, respectively, agrees to offer licenses according to the W3C Royalty-Free licensing requirements described in section 5 of the 5 February 2004 W3C Patent Policy for any portion of the Submission that is subsequently incorporated in a W3C Recommendation.

Suggested action

We propose that W3C adopt this Submission in a Community Group for ongoing development and maintenance purposes. W3C may also choose to incorporate elements in Recommendation Track specifications in a Publishing Working Group and/or other W3C Working Groups.


Inquiries from the public or press about this Submission should be directed to: public-digipub@w3.org


This 30th day of January, 2017,

W3C Members

Additional Contributors