Music Library Association Best Practices for opera adaptation of work

LC/PCC practice: See the Metadata Guidance documentation: Descriptive Relationship elements and Relationship labels.

LC/PCC practice: Optionally, apply the instruction using a note.

LC/PCC practice: Record the element using a structured description. If possible, express the relationship using a relationship label, or a relationship label in combination with an identifier or IRI, as allowed by the metadata management system. Apply this policy statement when recording: 1) an authorized access point in a bibliographic record, 2) an authorized access point for a related entity in an authority record, or 3) a structured value that is not functioning as an access point. If the metadata management system does not permit recording a relationship label for the element, omit it.

LC/PCC practice: When an instrumental work, vocal work, or a compilation of musical works is based on, inspired by, etc., one or two individual literary works or one or two individual art works, provide a Work: authorized access point for work for each related literary or art work. When an instrumental work, vocal work, or a compilation of musical works is based on, inspired by, etc., three or more works by the same creator, record a Work: related agent of work using a value of Agent: authorized access point for agent for the creator.