Abstract
A catalogue is the key to every collection. Its quality often determines the level of access to a collection, but also its interoperability with other collections. The workshop on descriptive models will focus on the current practice within institutions with photographic collections, the development and background of the SEPIADES (SEPIA Data Element Set) model, the SEPIADES software tool and Dublin Core as an exchange format for photographic collections.

Edwin Klijn is Project Manager of the SEPIA working group 'descriptive models for photographic materials' and co-author of 'In the Picture. Digitisation and Preservation of European Photographic Collections (Amsterdam, 2000). He has been working as Digitisation Officer at the European Commission on Preservation and Access (ECPA) since 1999 and was involved in several digitisation projects, specialising in database publishing on the Internet.

Laurents Sesink is application developer at the Netherlands Institute for Scientific Information Services in Amsterdam.