One of the cool new additions to EPUB 3 is the ability to include schema.org metadata. Although, in truth, it’s actually two new additions in one… or is that one new addition in two?
The obvious way to include schema.org metadata is in XHTML content documents now that both RDFa and microdata attributes are in the soon-to-be-final 3.0.1 update. If you’re wondering why you would want to do this, think about your book being opened up to indexing by a search engine. Rich metadata in the source sure isn’t going to harm your chances of improving your discoverability.
The less obvious place where schema.org properties can be used is in the package document metadata. The 3.0.1 revision saw the prefix ‘schema:’ reserved for adding this metadata, meaning you don’t have to declare it in an epub:prefix attribute every time you want to use it.
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