Music Library Association Best Practices for opus number

Routinely record the element in authority records if used as a component of an authorized or variant access point. Record the element in other cases if readily ascertainable.

In bibliographic records: Record the element if deemed useful for identification or selection.

In MARC: Record as an identifier using field 383 subfield $b.

See examples in MARC format: numeric designation of musical work

Format the opus number for a numbered part of a set of works by recording the opus number for the set, a comma, a space, and the number within the set.

Enclose the name of the publisher in parentheses following the opus number when it is needed as a component in an access point. Do not add parentheses when recording opus number as a separate element.

In MARC: Record the publisher in field 383 subfield $e following the opus number in subfield $b.

Enclose the name of the publisher in parentheses following the opus number when it is needed as a component in an access point. Do not add parentheses when recording opus number as a separate element.

In MARC: Record the publisher in field 383 subfield $e following the opus number in subfield $b.