Discovery Service: https://developers.google.com/discovery/ https://developers.google.com/discovery/v1/reference/ The "type" key: http://tools.ietf.org/html/draft-zyp-json-schema-03#section-5.1 The "format" key: http://tools.ietf.org/html/draft-zyp-json-schema-03#section-5.23 https://developers.google.com/discovery/v1/type-format Google JSON format docs: http://google-styleguide.googlecode.com/svn/trunk/jsoncstyleguide.xml