A work based on a previous work should be identified as the same work unless it has been so significantly changed as to have become a new related work. The following should all be considered to be new related works with new work identifiers, to be related back to the works from which they are derived by means of a related work identifier (see 1.3): dramatization, novelization, versification, paraphrase, rewriting, adaptation for children, parody, musical variation on a theme, free transcription of musical composition, adaptation from one medium of the graphic arts to another, abstracting, digesting, summarizing, and filming of primarily textual or musical works. The merger of two serial works creates a third new serial work; the splitting of one serial work creates two new serial works. Distinguish between moving image used as a mere recording mechanism to record the performance of a purely musical or a textual dramatic work (same work) without any added cinematographic content and the creation of a moving image adaptation of a dramatico-musical work or textual dramatic work with added cinematographic content (new work).
See 1.2.21 for a rule concerning creation of a note to explain the relationship between a new related work and the work on which it is based.