Music history, sometimes called historical musicology, is the highly diverse subfield of the broader discipline of musicology that studies the composition. In theory, 'music history' could refer to the study of the history of any type or genre of music (e.g., the history of Indian music or the history of rock). In practice, these research topics are nearly always categorized as part of ethnomusicology or cultural studies, whether or not they are ethnographically based. The methods of music history include source studies (esp. manuscript studies), paleography, philology (especially textual criticism), style criticism, historiography (the choice of historical method), musical analysis, and iconography. The application of musical analysis to further these goals is often a part of music history, though pure analysis or the development of new tools of music analysis is more likely to be seen in the field of music theory.