epubcheck
https://github.com/w3c/epubcheck
Java
The conformance checker for EPUB publications
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- Issues
- Improve reporting of issue locations using element paths
- Add support for EPUB for Archival purposes (EPUB/A)
- Validate text fragment locators (#:~:text=) in media overlay text src
- Image Dimensions
- Check for multiple occurence of OPF guide references with type="text"
- Context menu item request
- A png when passed thorugh the epubcheck, gets mistaken for JPEG, even tho the magic bytes are correct (when using xxd or hexdump)
- URL normalization of OCF resources
- Add a new Vocab type for permissive enum-based vocabularies
- fix: use correct german quotes and fixed some mistakes
- Docs
- Java not yet supported