Steve is right, composer would be listed in the 100 tag. Conductor will most likely be listed in the 511 tag which lists performers/participants in a work. As always, local cataloging practices may vary but those are the standards. Thanks, Ron -----Original Message----- From: Code for Libraries <[log in to unmask]> On Behalf Of McDonald, Stephen Sent: Tuesday, July 28, 2020 11:42 AM To: [log in to unmask] Subject: Re: [CODE4LIB] With MARC how do you search out from a catalog a conductor's own musical compositions separating from the conductor's many performances of other composers' works? A work composed by a person would have that person listed as an author in the 100 field. I don't think a conductor is supposed to be listed in the 100 field of a performance. Steve McDonald [log in to unmask] -----Original Message----- From: Code for Libraries <[log in to unmask]> On Behalf Of don warner saklad Sent: Tuesday, July 28, 2020 2:28 PM To: [log in to unmask] Subject: [CODE4LIB] With MARC how do you search out from a catalog a conductor's own musical compositions separating from the conductor's many performances of other composers' works? With MARC how do you search out from a catalog a conductor's own musical compositions separating from the conductor's many performances of other composers' works?