This specification defines rules and guidelines for adapting the RDFa Core 1.1 and RDFa Lite 1.1 specifications for use in HTML5 and XHTML5. The rules defined in this specification not only apply to HTML5 documents in non-XML and XML mode, but also to HTML4 and XHTML documents interpreted through the HTML5 parsing rules.

World Wide Web Consortium
M. Sporny (Manu)
Distributed and Interactive Systems

McCarron, S., Adida, B., Birbeck, M., Kellogg, G., Herman, I., & Pemberton, S. (2013). HTML+RDFa 1.1, W3C Recommendation. (M. Sporny, Ed.). World Wide Web Consortium.