I've been playing around with CFGs (context free grammars) and implemented a LL, LR and CYK-type chart parser. Also played around a bit with an Earley parser. I think I have a good grasp on CFGs and was hoping to look at CSGs. It seems though, online, there is far less information on these. Most of the pages I find are simply power point/slides from a univeristy class (and barely cover the basics) or journal articles behind a paywall I can't get access to.
Does anyone know of any good online and free material on CSGs? In particular CSG parsers. Has anyone tried to implement one? What are your thoughts?