of course !
This is Wikipedia
This is one is for your reference
And a presentation follows. There are many more
All these presentations are so long, I have a hard time to go through them
Because the web frontend is not my thing, I'm not sure what novelty they introduce, exactly. I have a feel that they are somewhat similar to what can be achieved with the Hoplon elements (defelem ) but I'd like a broken down version of the relationship between the two.