+ void add_score (SCM);
+ void add_bookpart (SCM);
+ Paper_book *process (Output_def *def_paper,
+ Output_def *def_layout);
+ Paper_book *process (Output_def *default_paper,
+ Output_def *default_layout,
+ Paper_book *parent_part);
+ void set_keys ();
+
+protected:
+ void set_parent (Book *parent);
+ void add_scores_to_bookpart ();
+ bool error_found ();
+ void process_score (SCM score,
+ Paper_book *output_paper_book,
+ Output_def *layout);
+ void process_bookparts (Paper_book *output_paper_book,
+ Output_def *paper,
+ Output_def *layout);