[1] Edge Types - Social Graph API - Google Code ( ( 版)) <http://code.google.com/intl/ja/apis/socialgraph/docs/edges.html>
[2] google-sgnodemapper - Google Code ( 版) <http://code.google.com/p/google-sgnodemapper/>
With sgnodemapper, all of those would map to sgn://livejournal.com/?ident=brad . And then, from the sgn URL, you can map back to http:// URLs for any known type: content page, profile page, RSS, Atom, etc.