The Social Graph Node Mapper is a community project to build a portable library to map social networking sites' URLs to and from a new canonical form (sgn:// URLs).

For example, the following URLs are all the same person:

• http://brad.livejournal.com/
• http://brad.livejournal.com/data/foaf
• http://brad.livejournal.com/data/rss
• http://brad.livejournal.com/data/atom
• http://brad.livejournal.com/profile
• http://www.livejournal.com/userinfo.bml?user=brad
• etc

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.

The core library is portable, implemented in JavaScript, and then there are tiny bridge layers which bind the language-specific libraries to both a JavaScript interpreter (either SpiderMonkey or Rhino) and the sgnodemapper core. Bindings are available for:

• C, C++ -- using SpiderMonkey
• Java -- using Rhino
• Perl -- using JavaScript::SpiderMonkey
• PHP -- thanks to Plaxo, wrapping the C++ library

Coming soon:

• Python -- using python-spidermonkey
• Ruby -- using ruby-spidermonkey

Commit emails go here:

• http://groups.google.com/group/sgnodemapper-commits

Live web demo using the latest files in svn is here:

• http://google-sgnodemapper.googlecode.com/svn/trunk/webdemo/demo.html