[NTG-context] an object representation of the node list of a paragraph: a lua table or a JSON

Hello list, i'd like having an object representation of a typeset paragraph or even a page, preferably as a JSON object, but a Lua table is equally good. My reference is section "4.4 Node lists" of the CLD manual. Before writing an iterator over the list of nodes of a paragraph, figuring out all the possible nodes and their fields, i'm wondering if there's some hidden tool in the ConTeXt coffer to simplify the task. Best wishes, Massimiliano