Records in either RDA, AACR2, or hybrid format may be exported into the OPAL catalog. However, bibliographic records created using Resource Description and Access (RDA) rules, whether cataloging at the copy or original level is preferred. If no matching bibliographic record exists in WorldCat, derive or create a new record in accordance with current cataloging practices, e.g., Resource Description & Access (RDA). Record examples can be found on the RDA Resources Page