EpubCCWhat is EPUB Accessibility 1.1?
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EPUB Accessibility 1.1 is the W3C Recommendation, published in October 2024, that defines when an EPUB is accessible and how to say so. It requires discovery metadata, WCAG 2 conformance and EPUB-specific features such as page navigation where a print edition exists.
Why it matters when you convert a PDF to EPUB
Stores, libraries and the European Accessibility Act look for its conformance statement (dcterms:conformsTo) and the schema.org accessibility metadata it asks for. A converted PDF can be a good starting point, but only a publication that really meets the requirements should claim conformance.
The specification lists valid conformance strings such as "EPUB Accessibility 1.1 - WCAG 2.2 Level AA" and also asks for information about who evaluated the publication.
How EpubCC handles it: the engine writes no conformance statement and no accessibility metadata. What it contributes is structure: headings, reading order, language, a table of contents and linked notes, which is the part of accessibility that a PDF most often lacks.
Related terms
EPUBCheck messages about this
OPF-066Missing "dc:source" or "source-of" pagination metadata. The pagination source must be identified using the "dc:source" and "source-of" properties when the content includes page break markers.
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