class Bezier;
class Bezier_bow;
class Book;
-class Book_output_def;
+class Output_def;
class Break_algorithm;
class Change_iterator;
class Change_translator;
class Music_wrapper_iterator;
class Page;
class Pitch;
-class My_lily_lexer;
+class Lily_lexer;
class Note_performer;
class Output_property;
class Paper_book;
class Paper_column;
class Output_def;
-class Paper_line;
+class Paper_system;
class Paper_outputter;
class Paper_score;
class Paper_stream;