Concise AACR2: 27.Works of mixed responsibility

27A. Scope

A work of mixed responsibility is one that involves the collaboration of two or more persons or bodies (see rule 23B2 for cases in which a corporate body is responsible) and to which the persons and/or bodies make different kinds of contribution. Examples of the different kinds of contribution are: writing, adapting, illustrating, editing, arranging, translating, and performing.

Typical instances of mixed responsibility are:

a work with text by one person and illustrations by another
a work created by one person and adapted by another
a work by one person with a commentary by another
a work by one person translated by another
a law for which a corporate body is responsible with a commentary by a person
an electronic resource created by one person with software written by another
a musical work by one person arranged by another
a musical work by one person performed by another person or by a performing group.

This rule divides all cases of mixed responsibility into two types.

These are:

modifications of existing works (see rule 27B)
new works produced by the collaboration of different persons and/or bodies making different intellectual or artistic contributions (see rule 27C).

27B. Modifications of existing works

27B1.

Enter a work that is a modification of an existing work under the heading for the new work and make a name/title added entry (see rule 29B4) for the original work if the nature and content of the original has been changed substantially or if the medium of expression has changed.

Examples of such change are:

paraphrases, rewritings, adaptations for children, and versions in a different literary form of written works
revisions of texts when the reviser(s) is named in the chief source and the original author(s) either is no longer named in the title and statement of responsibility area or is named only in the title proper
commentaries when the bibliographic resource is presented as a commentary
adaptations of graphic art works from one medium of the graphic arts to another
reproductions of art works with text when the writer of the text is represented as the author of the work in the chief source of information
alterations (free transcriptions, etc.), paraphrases, and variations of musical works
sound recordings of works by different persons performed by a principal performer or performers ¹
novels, etc., based on motion pictures, television shows, etc.
motion pictures, television shows, electronic resource, etc., based on novels and other texts.

27B2.

Enter any other modification of an existing work under the heading for the original work.

Examples of modifications entered under the headings for the original works are:

musical works by one person performed by another
translations
arrangements of musical works
texts with commentary when the item is presented as an edition of the text
abridgements of, and excerpts from, existing works
illustrated works.

27C. New works produced by persons or bodies making different intellectual or artistic contributions

Enter a work produced by two or more persons or bodies making different intellectual or artistic contributions under the heading for the person or body given prominence by the wording or layout of the chief source of information of the bibliographic resource being catalogued. If there are two or three collaborating persons or bodies, make an added entry under the heading(s) for the other(s).

If no one person or body is given prominence and there are two or three persons or bodies named, enter under the heading for the person or body named first in the chief source. Make an added entry under the heading(s) for the other(s).

If no one person or body is given prominence and there are more than three persons or bodies named, enter under title. Make an added entry under the heading for the person or body named first.

1. Consider such a sound recording to have a principal performer or principal performers when the wording, layout, typography, etc., of the chief source of information clearly present the activity of the performer(s) as the major purpose of the recording.