[1] [CITE[The Open Graph protocol]]
( ([TIME[2013-11-12 14:44:05 +09:00]] 版))
<http://ogp.me/>

[2] [CITE@ja[Platform Updates: New Open Graph Tags for Media Publishers and More- Facebook Developers]]
( ([TIME[2013-12-11 02:52:52 +09:00]] 版))
<https://developers.facebook.com/blog/post/2013/06/19/platform-updates--new-open-graph-tags-for-media-publishers-and-more/>

[3] [CITE@ja[Using Self-Hosted Objects - Facebook開発者]]
( ([TIME[2013-12-11 02:53:22 +09:00]] 版))
<https://developers.facebook.com/docs/opengraph/using-objects/>

[4] [CITE@ja[Creating Object Types - Facebook開発者]]
( ([TIME[2013-12-11 02:53:50 +09:00]] 版))
<https://developers.facebook.com/docs/opengraph/creating-object-types/#properties>

[5] [CITE@ja[技術仕様 << mixi Developer Center (ミクシィ デベロッパーセンター)]]
( ([TIME[2013-11-29 01:57:33 +09:00]] 版))
<http://developer.mixi.co.jp/connect/mixi_plugin/mixi_check/spec_mixi_check/>