…toc-section))))) % define section-aware piece-toc-item-command piece = #(define-music-function (text) (markup?) (begin (if (get-toc-section) (add-toc-item! 'tocCollMarkup (get-toc-section))) (set-toc-section! #f) (… …e f } } } #(set-toc-section! "section 2") \bookpart { \piece \markup { "piece 1" } \score { \relative c' { c d e f } } } \bookpart { \piece \markup { "piece 2" } \score { \relative c' { c d e …