I want to gather together all the notes I have where the prototype name begins with “Document” and then exclude from that set all notes which have and [user attribute1]>0 and also exclude all notes which have [useratribute2]>0.
Whilst there is no SQL-like ‘NOT’ join, n’ot’ is data dependent and if you take a look through this part of aTbRef the per-type ‘not’ matches are described. I assume as database ‘NOT’ varies by addressed data type and—with less confidence—assume what that means by data type is documented (probably not). So, yes, Tinderbox lacks such an all-type wrapper for negative joins but it does provide the negative operators (and they are described†).
†. If you find otherwise, let me know. I’m always happy to plug gaps.