[QA] 作品編號

有位網友來信問Amadeus電影與作品編號的問題，原文是英文，我把我的回答挑重點翻成中文：

From 李璨光 Subject 莫札特作品編號

and i got some question about his work listwhat do those little letters after the numbers mean Theyare denoted works found later. For example, K45 and K46 had been datedfirst, but new pieces of works were found later and dated in betweenthem; thus "K45a" and "K45b" were used reasonably and conveniently tokeep track of this historical process. You might ask what ifpeople find a new piece and date it between K45 and K45a. Well...That's why his work list has so many different versions. In recent50-100 years, I believe, canonical versions were well published andthere shouldn't be any incompatibility and confusion. Musicologists,compared to researchers in other fields, do talk to each other. : ) 翻譯： 請問莫札特作品列表裡，有些數字後面有英文字母，是什麼意思？ 有這些字母的作品，表示作品是後來才發現的。舉例來說，學者先找到兩部作品，根據作品完成順序而定為K45和K46。但後來卻又找到新作品，完成時間在K45與K46之間。一個合理而方便的辦法是用K45a和K45b來編號。 也許您會好奇，如果又找到一個夾在K45和K45a之間的作品怎麼辦？其實，這也就是為什麼莫札特作品列表有好幾個代版本。不過，我相信近五十至一百年間，具權威性的作品列表版本已廣為發行流傳，所以如果真有必要再更新版本，與原來版本應該不會不相容。音樂學家們之間的聯繫與合作，可不是其他領域隔行如隔山的情形能想像的。