In modern composition, music notation (the writing on the page indicating each note’s placement and the effect of each beat of a musical selection) became more sophisticated. It used the medium of the printed sheet for its purpose. However, in classical compositions, music notation is rarely used. Instead, most solos and dramatic pieces have been assigned pre-set meter patterns, called simple forms. As in other fields, the notation is a highly formalized system but is also used for a wide variety of different purposes. The two main factors that distinguish music notation from other types are its structural independence (diverging very sharply between stanza and fugue sections, for example) and the use of pre-set forms (each being a compact description of the various parts of a stanza or piece).