Knowlton's article discusses the "multiple versions problem" (sometimes called the MulVer problem) that arises when cataloging reproductions. He provides a brief overview of how reproductions have been handled under various cataloging codes. He then discusses how RDA, with its basis in FRBR principles, will deal wtih the MulVer problem. While the proposed new cataloging code may help to clarify relationships between originals and reproductions, Knowlton argues that, "RDA as currently designed is challenging for the cataloger and includes many data that may prove to be difficult for catalog users to understand."
Read Knowlton's article in Library Resources & Technical Services, vol. 53, no. 3 (July 2009), pages 159-165.