Editing Libretto (section)

==Publication==
Libretti have been made available in several formats, some more nearly complete than others. The text – i.e., the spoken dialogue, song lyrics and stage directions, as applicable – is commonly published separately from the music (such a booklet is usually included with sound recordings of most operas). Sometimes (particularly for operas in the [[public domain]]) this format is supplemented with melodic excerpts of [[Sheet music|musical notation]] for important numbers.

Printed [[Sheet music|scores]] for operas naturally contain the entire libretto, although there can exist significant differences between the score and the separately printed text. More often than not, this involves the extra repetition of words or phrases from the libretto in the actual score. For example, in the [[aria]] "[[Nessun dorma]]" from Puccini's ''[[Turandot]]'', the final lines in the libretto are "Tramontate, stelle! All'alba, vincerò!" (Fade, you stars! At dawn, I will win!). However, in the score they are sung as "Tramontate, stelle! Tramontate, stelle! All'alba, vincerò! Vincerò! Vincerò!".

Because the modern musical tends to be published in two separate but intersecting formats (i.e., the book and lyrics, with all the words, and the piano-vocal score, with all the musical material, including some spoken cues), both are needed in order to make a thorough reading of an entire show.