Köchel catalogue son's earlier works; Mozart's catalogue of his own compositions (begun in February 1784 with K. 449) allows relatively precise dating of many of his later works. The catalogue included the opening bars of each piece, known as an incipit. Köchel divided the corpus into a main chronology of 626 works, and five appendices ("" in German, abbreviated to "Anh.") The appendices (Anh. I-V) included: Since Köchel published his original catalogue in 1863 (now referred to as K), the dating of Mozart's compositions has been subject to constant revision. Many more pieces have since been found, re-dated, re-attributed and re-numbered, requiring
Catalogues of Beethoven compositions catalogue in the 1950s, in which he included pieces not included in the 19th century complete edition published by Breitkopf and Härtel. Hess included many more fragmentary works than did Kinsky, and his catalog runs to 335 entries in the "Hauptkatalog" (main catalogue), and 66 "doubtful and falsely-attributed" works in an appendix. Many pieces have both WoO and H numbers. Beethoven's compositions are also organized through the Biamonti Catalogue, compiled by Giovanni Biamonti and published in 1968. This work is an attempt to chronologically order all of Beethoven's creative output, in a manner similar to the catalogue of Franz Schubert's