If we are cataloging a work, with a preface by someone other than the main author, RDA 20.2.1 says this is a relationship between a person and an expression.
The examples in RDA 20 list this as "Writer of Added Commentary, Etc." In Appendix I.3, "Relationship Designators for Persons, Families, and Corporate Bodies Associated with an Expression" I see the following relationship designators: writer of added commentary A person, family, or corporate body contributing to an expression of a work by providing an interpretation or critical explanation of the original work. writer of added text A person, family, or corporate body contributing to an expression of a primarily non-textual work by providing text for the non-textual work (e.g., writing captions for photographs, descriptions of maps). If I wanted to give an access point for this person, and use a relationship designator, would I have to use "writer of added commentary" (which is the closest fit, I think, though not quite the same) or could I use "writer of preface", which is not on the list? Benjamin Abrahamse Cataloging Coordinator Acquisitions, Metadata and Enterprise Systems MIT Libraries 617-253-7137
