I translated the OpenSocial API Specification (v0.8).

[OpenSocial API Specification (v0.8)][http://devlog.agektmr.com/wiki/index.php?cmd=read&page=OpenSocial%2FOpenSocial API 仕様%20%28v0.8%29]

I actually finished this about a month ago, but I'm sharing it here on the blog as well. Please let me know if you spot any errors.