Via Rajdeep Dua on shindig-dev, “Shindig : An Architectural Overview ( PHP Version)”
Shindig is the Apache-incubated project to build an opensource implementation of the Google-and-friends OpenSocial platform for gadgety social networking. Most activity on the list is around the Java version, but a PHP effort/port is also underway.
This article follows the earlier “Architectural Overview of Shindig , an OpenSocial Reference Implementation“; both are based on work-in-progress code from Shindig svn.
One part that caught me eye was this handy (if inaccessible) overview of the schemas:
Figure 7 provides the details of various classes which represent and store the social graph on the client side for OpenSocial APIs.