Hi, Recent discussions with a number of people from the Sling community [1] have helped clarify my thoughts about this, I have started a wiki page at https://cwiki.apache.org/confluence/display/SLING/Sling+Type+System%3A+motivation+and+requirements and feedback is welcome, on that page or here.
Roughly, the goal is to create a Sling Type System that defines much more precisely what the various Resource Types can contain, how they work together, etc. with the goal of generating self-describing interfaces. Let's see where this leads, it's just rough ideas so far but it feels like a useful unifying concept for Sling. -Bertrand [1] along with reading "a conversation with Alan Kay, creator of Smalltalk" - https://queue.acm.org/detail.cfm?id=1039523
