This specification was published by the epub 3 community group. Epub accessibility frequently asked questions github pages. This site uses epubcheck to provide validation information for epub 2 and 3 documents. Evaluation metadata accessible publishing knowledge base. As of june 2014, the latest released version of epub is epub 3. It became an official standard of the idpf in september 2007, superseding the older. It checks whether your ebook meets the requirements for epub and epub3, and it. The new epub3 validator based on epubcheck and is hosted online by the idpf here. This specification is one of a family of specifications that compose epub 3. Create richlayout publications in epub 3 with html5, css3, and. This is a maintenance release of epubcheck, the conformance validator for. This specification takes an abstract approach to the accessibility requirements for epub publications, similar to how wcag 2. It must be a conformant nonvalidating processor xml.
Some of the content conformance constraints can be checked by validating content. It is, then, a really good idea to run your ebook through epubcheck before. It is meant to be read and understood in concert with the other specifications that make up epub 3. This epubcheck version is also available in the maven central repository as. An index to key concepts and definitions defined across these specifications is. Epub 3, the third major revision of epub, is defined by a set of specification documents including this document, which defines publicationlevel semantics and conformance requirements for epub 3. Has epub validator been out of action for some time or is this a blip.
A validation process document is currently under development that will guide in. The book industry study group endorses epub 3 as the format of choice for. Alternatively, you can just upload the ebook file to the idpf validator, which. This approach allows the guidelines to remain stable even as the format evolves. If an author wants to communicate a desired size or aspect ratio e. Epub accessibility epub accessibility defines accessibility conformance and discovery metadata requirements for epub publications. The base document m ust be the only spine entry publications301 in the package document 3. Contribute to idpf epub3samples development by creating an account on github. Youll learn about validating epub 3 documents, navigation and. 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 singlefile container.
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