MLA BP
Music Library Association Best Practices for Music Cataloging Using RDA and MARC21 for Chapter 18: General Guidelines on Recording Relationships to Persons, Families, and Corporate Bodies Associated with a Resource
MLA BP for 18.4.1.1
IDENTIFIER FOR THE PERSON, FAMILY, OR CORPORATE BODY
MLA recommendation: Follow 
, that is, provide access points when referencing related persons, families and corporate bodies. Identifiers are not used to express such relationships in the current MARC environment.
, that is, provide access points when referencing related persons, families and corporate bodies. Identifiers are not used to express such relationships in the current MARC environment.MLA BP for 18.5.1.3
RECORDING RELATIONSHIP DESIGNATORS
MLA recommendation: Generally give relationship designators for all persons and corporate bodies for which access points are given, except for persons or corporate bodies that form a part of a name/title access point in fields 700-711 or 800-811, or in 76X-78X linking fields. Give terms in $e rather than codes in $4.1
EXAMPLE
| 100 1_ | Alvin, Dave, $e composer, $e performer. |
| 710 2_ | Bossa Jazz Trio, $e instrumentalist. |
| 710 2_ | Stanford University. $b Chamber Chorale, $e singer. |
| 100 1_ | Ewazen, Eric, $d 1954- $e composer. |
| 700 1_ | Huth, Peter $c (Music editor), $e editor. |
| 700 1_ | Ryerson, Edward L. $q (Edward Larned), $d 1886-1971, $e former owner, $e dedicatee. |
| 100 1_ | Cage, John, $e composer. |
| 240 10 | Melodies, $m violin, keyboard instrument |
But
| 700 12 | $i Container of (work): $a Cage, John. $t Melodies, $m violin, keyboard instrument. |
For further information, see PCC Guidelines for the Application of Relationship Designators in Bibliographic Records.