Back to Error DirectoryEuropean Accessibility Act (EU Enforcement)
EAA-ACC-FEATURECritical Ingestion Error

Missing Mandatory schema:accessibilityFeature Metadata

The OPF metadata lacks accessibility feature declarations like structuralNavigation.

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Fix all EAA-ACC-FEATURE errors in your EPUB automatically

PreFlight tests your navigation file, verifies image alt coverage, and inserts exact schema:accessibilityFeature declarations reflecting your file structure.

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What This Error Means in Plain English

EU retailers require an explicit inventory of accessibility features present in the publication, such as table-of-contents navigation and alternative text.

Why Retailers & EAA Regulations Block This File

Non-compliant backlists are flagged during EU retailer automated catalog audits and queued for de-listing.

Technical Specification: Under EPUB Accessibility 1.1, schema:accessibilityFeature must detail navigation, alternative text, reading order, and table structure.

Manual Fix Instructions (for Sigil / Calibre)

  1. Verify that your book contains a working nav.xhtml file.
  2. Add <meta property="schema:accessibilityFeature">structuralNavigation</meta> to content.opf.
  3. If images have alt text, add <meta property="schema:accessibilityFeature">alternativeText</meta>.