Just want to add -- what I really like about this paper is the notion of an addressable DOM (WOM :) -- being able to navigate through a live object tree in a reasonably defined way is nice. Working directly with a JSON-style map is fairly easy for many things but a) has no error-checking :D and b) is really crap to query and navigate -- especially you have no way to jump to a parent node from a child node with a raw JSONy structure.

So a DOM-like interface on the underlying tree should be *super* helpful.

-- brion