I finally managed to write a (semi) useful plug-in that helped me understand variables in the context of source provider in the Command Core Expressions Framework. The code is puvlished under the Apache 2.0 license and is available on google code @ http://code.google.com/p/rcprevealsourceprovider/. This plug-in will track all source provider variables and isplay their values in real-time. It took me a while to undersatnd how to work them and hopefully this plug-in or at least the code will be useful to someone. It's been a while since I published anything on this blog, but I have been real busy in the last 18 months, hopefully I am back on a roll and will keep posting more regularly.