If NestedText is meant to be written by non-programmer humans, the details of null, undefined, 0, false, "NO", nil, or whatever else, would likely also be lost

If NestedText is meant to be written by non-programmer humans, the details of null, undefined, 0, false, "NO", nil, or whatever else, would likely also be lost on them. Most likely if their input is meant to be machine interpreted they would need to be trained to provide specific inputs anyway. I like that NestedText doesn't hide that problem. It lets the user organization decide how it wants to manage that problem, and what symbols or words are understood by the people authoring the files.