Schema.org is a collaborative, community activity with a mission to create, maintain, and promote schemas for structured data on the Internet, on web pages, in email messages, and beyond.
M. Heidingsfeld, P. Rapp, M. Böhm, and O. Sawodny. IEEE International Conference on Advanced Intelligent Mechatronics, page 904--909. Munich, Germany, IEEE, (July 2017)