Safe object traversal: if you can traverse objects you can start to create search algorithms (which is what Prolog's solver really is) that work across differen

Safe object traversal: if you can traverse objects you can start to create search algorithms (which is what Prolog's solver really is) that work across different domains and objects. I think this is a path towards goal-oriented programming. ASTs: by representing the program in a more abstracted way, we can start to build tools that manipulate them in ways other than ASCII editors. Direct manipulation of data: well, Bret brought this one up, not me. I thought it was a little odd. While spatial representation of code was about stretching our ASCII into something else, I chose to interpret this as stretching our concrete editing tools towards code. In other words, how do you add abstractions to concrete editing tools. I think the simplest task would be the one to start with: how do you parametrize something in a concrete data editor?