Many Digital Library Systems
Libraries have now been involved in the creation of digital library systems for more than a decade. In some cases they have developed a large number of projects. For example, Cornell University has developed Project Euclid; the Core Historical Literature of Agriculture; Historical Math Monographs; the USDA Economics, Statistics and Market Information System; the Samuel J. May Anti-Slavery Collection; the Making of America project; and the HEARTH (Home Economics Archive: Research, Tradition, History) collection. Rather than re-inventing descriptive metadata for each one of these systems, many of which include digital representations of materials the library has in its print collections, the descriptive metadata used to describe those print materials—MARC metadata from the library catalog—is repurposed and used to describe the digital representations.