The Publishing Maintenance Working Group invites implementations of the following three Candidate Recommendation Snapshots:
- EPUB 3.4: EPUB® 3 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. This specification defines the authoring requirements for EPUB publications and represents the fourth major revision of the standard.
- EPUB Reading Systems 3.4: This specification defines the conformance requirements for EPUB 3 reading systems — the user agents that render EPUB publications.
- EPUB Accessibility 1.2: This specification specifies content conformance requirements for verifying the accessibility of EPUB® Publications. It also specifies accessibility metadata requirements for the discoverability of EPUB publications.
Comments are welcome via GitHub issues by 19 October 2026.