From W3C Wiki
This page describes some of the sources of schema.org vocabulary.
See IPTC rNews / schema.org guide for details of the IPTC / rNews schema.org vocabulary.
See also schema.org blog.
GoodRelations Vocabulary for E-Commerce
The GoodRelations Vocabulary is a powerful conceptual model for exposing e-commerce data on the Web, e.g. details about products, stores, companies, offers, and much more. It has been developed and maintained by Martin Hepp since 2002 and is widely adopted. The sponsors of schema.or and Martin Hepp are working on integrating GoodRelations into schema.org. This means that you will be able to use GoodRelations directly from the schema.org namespace. GoodRelations will remain an independent activity and can be used in a variety of syntaxes, including RDFa, RDF/XML, Turtle, OData, GData, etc. See this page for details about the integration.