We're working on a parser for our band's setlists, and we want it to be compatible (and eventually, to be able to cross-reference included songs with) setlists from Grateful Dead, Allman Brothers, Widespread Panic, Travelin' McCourys, Leftover Salmon, Billy Strings, etc.<p>We have run into this question already a few times: when we have a guest, and we play an original written by that guest, how is it best reflected in the setlist?