WebSchemas/SchemaDotOrgSources
From W3C Wiki
This page describes some of the sources of schema.org vocabulary.
IPTC rNews
See IPTC rNews / schema.org guide for details of the IPTC / rNews schema.org vocabulary.
See also schema.org blog.
WikiDoc Collaboration
This vocabulary began as a collaboration between WikiDoc and a Google team, before moving to schema.org. See the blog post and supporting documentation for details.
