Sakai Kernel
Prior to Sakai 2.6, the back-end or framework services were part of the overall Sakai package. Starting with Sakai 2.6, these services were pulled out into a separate Sakai Kernel package. Sakai 2.6, and the rest of the 2.x series, are based on version 1 of this Kernel (or K1). Sakai 3 is likely to be based on the next major release of the Kernel, version 2 or K2.
Kernel 1 (K1)
Kernel 1.0.0 was released in October 2008 for use by Sakai 2.6, which is anticipated to be released Mid July, 2009. Kernel 1.0.x maintenance releases are anticipated as bugs and performance issues are resolved, however, new features in the Kernel 1.x (K1) series will be reserved for Kernel 1.1; it is likely that Sakai 2.7 will be based on Kernel 1.1.
More information on Kernel 1.x...
Kernel 2 (K2)
Beginning in late 2008 Kernel 2 (or K2) began evolving rapidly as a possible replacement kernel architecture on which to build Sakai 3. Here are some important sources of information on K2:
- Google Group (Key Docs)
http://groups.google.com/group/sakai-kernel - Ohloh Site
https://www.ohloh.net/p/sakai-kernel - Git Repository
http://github.com/ieb/open-experiments/tree/master
Sakai K2 is based on Apache Sling which aims to create a Content Management System based on Apache Jackrabbit. Apache Sling is being used as the basis for a number of commercial Content Management Systems including Day Software's CQ5 see http://www.day.com