Hi Tom > I think you misunderstand tagged systems at a very basic level. You think > that html can only use a bold tag once in a document? Thats equivalent > to what you are saying. Would the "additional" segment contain the same amount of nSequence-equivalent token as the number of inputs in the "inputs" segment? What if you only want to add a per-input-token in the additional segment for a certain input (assume last input)? I guess the fundamental difference to html is the possible nesting. However, I think that should be mentioned/specified in the BIP.