Schema.org: Schema.org is an initiative launched in 2011 by Google, Bing, and Yahoo! (later joined by Yandex) to create and support a common set of schemas for structured data markup on Web pages. The LRMI specification for tagging educational content awaits formal adoption by Schema.org.
Learning Registry: The Learning Registry is an open source technical system designed to facilitate the exchange of data behind the scenes, and an open community of resource creators, publishers, curators, and consumers who are collaborating to broadly share resources. It is a joint effort of the U.S. Department of Education and the Department of Defense, with support from the White House and numerous federal agencies, nonprofit organizations, international organizations, and private companies.
IEEE Learning Technology Standards Committee (LTSC): This organization is chartered by the IEEE Computer Society Standards Activity Board to develop internationally accredited technical standards, recommended practices, and guides for learning technology.
Dublin Core Metadata Initiative: This organization supports innovation in metadata design and best practices across a broad range of purposes and business models. DCMI explores the role of metadata in addressing a variety of global challenges, including education.