Editing Opus number (section)

==Other catalogues==
{{main|Catalogues of classical compositions}}
To manage inconsistent opus-number usages&nbsp;– especially by composers of the [[Baroque]] (1600–1750) and of the [[Classical music era|Classical]] (1720–1830) music eras&nbsp;– [[musicology|musicologists]] have developed comprehensive and unambiguous catalogue number-systems for the works of composers such as:

* [[Johann Sebastian Bach]]&nbsp;– catalogued with a '''BWV'''-number; a ''[[Bach-Werke-Verzeichnis]]'' number assigned by [[Wolfgang Schmieder]]; however, older sources occasionally use '''S'''-numbers.
* [[Dietrich Buxtehude]]&nbsp;– catalogued with a '''BuxWV'''-number, a ''Buxtehude-Werke-Verzeichnis'' work number.
*[[Marc-Antoine Charpentier|Marc-Antoine Charpentier&nbsp;]]– identified with an H-number per H.W. Hitchcock's comprehensive catalogue.
* [[Frédéric Chopin]]&nbsp;– four catalogue systems have been applied: (i) '''B'''-numbers, by [[Maurice J. E. Brown]]; (ii) '''KK'''-numbers, by [[Krystyna Kobylańska]]; (iii) work-letters ('''A''', '''C''', '''D''', '''E''', '''P''' and '''S'''), by Józef Michał Chomiński; and (iv) '''WN'''-numbers in the [[Chopin National Edition]]. Generally, these alternative music-catalogue systems identified compositions that the composer had not numbered.
* [[Claude Debussy]]&nbsp;– identified with an '''L'''-number, per [[François Lesure]]'s comprehensive catalogue.
* [[Antonín Dvořák]]&nbsp;– identified with a '''B'''-number, per [[Jarmil Burghauser]]'s comprehensive catalogue; which resolved the problems of different and duplicate opus-numbers assigned by the publishers of Dvořák's music.
* [[Joseph Haydn]]&nbsp;– identified with a '''Hob.'''-number, per the 1957 catalogue by [[Anthony van Hoboken]]. Although he assigned Hoboken-numbers to the [[List of string quartets by Joseph Haydn|string quartets]], those compositions usually are known by opus numbers.
* [[Franz Liszt]]&nbsp;– identified with an '''S'''-number, per the catalogue ''The Music of Liszt'' (1960), by [[Humphrey Searle]].
* [[Wolfgang Amadeus Mozart]]&nbsp;– identified either with a '''K'''-number or with a '''KV'''-number (''[[Köchel catalogue|Köchel-Verzeichnis]] nummer''), per the catalogue system of [[Ludwig Ritter von Köchel]].
* [[Niccolò Paganini]]&nbsp;– identified with an '''MS'''-number, per the 1982 ''Catalogo tematico'', by [[Moretti and Sorrento]].
* [[Domenico Scarlatti]]&nbsp;– identified with three catalogue systems; (i) '''L'''-numbers, per the 1906 catalogue by [[Alessandro Longo]]; (ii) '''K'''-numbers and '''Kk'''-numbers, per the 1953 catalogue by [[Ralph Kirkpatrick]]; and (iii) '''P'''-numbers, per the 1967 catalogue by [[Giorgio Pestelli]].
* [[Franz Schubert]]&nbsp;– identified with a '''D'''-number, per the [[Deutsch catalogue|catalogue of Otto Erich Deutsch]].
* [[Maurice Ravel]]&nbsp;– identified with an '''M'''-number, per the 1986 [[List of compositions by Maurice Ravel|catalogue]] by [[Marcel Marnat]].
* [[Henry Purcell]]&nbsp;– identified with a '''Z'''-number, per the [[List of compositions by Henry Purcell|catalogue]] by [[Franklin B. Zimmerman]].
* [[Antonio Vivaldi]]&nbsp;– identified with a '''RV''' number, per the Ryom-Verzeichnis catalogue by [[Peter Ryom]].
* [[Gustav Holst]]&nbsp;– identified with an '''H.''' catalogue number,  per A Thematic Catalogue of Gustav Holst's Music by [[Imogen Holst]].