L ibrarians know how to maintain catalog data. Since the days of using industrialgrade erasers to correct and update information on catalog cards, they have made maintaining catalogs an important part of their business to ensure that the contents of the surrogate bibliographic records they present to users are complete and accurate. In spite of this history of catalog maintenance, librarians have not yet given the same kind of focus to the catalog data in newer resource discovery systems-that is, to information in databases other than the online public access catalog (OPAC) and in metadata formats other than MARC. This lack of attention to the integrity of these new catalogs is not necessarily intentional. Those responsible for the general upkeep of digital collections and the bibliographic metadata associated with these aggregates are often distributed throughout the library or even across multiple libraries, and they are not always the practitioners of traditional library technical services. These keepers of non-MARC metadata are as likely to be found in library systems offices or in metadata services departments as in cataloging, catalog maintenance, or database management units.In a 2004 article on the redesign of database management (DBM) at Rutgers University Libraries, Bogan recounted the use of a core competency model to help identify those aptitudes and skills that most characterize traditional DBM staff. She maintained that understanding these qualities and the values that underpin them allows technical services managers to reposition DBM staff to make useful contributions to the maintenance of a library's digital collections and the catalogs that describe them, and to work in the broader bibliographic infosphere for which libraries now create and maintain data in multiple resource discovery systems. At Rutgers, the DBM team defined its core competency and its role in the library as "fast and accurate maintenance and conversion of bibliographic and related metadata to support Rutgers University Libraries' resources." 2 Further, Bogan