It consists of three databases the Epigraphic database, the Epigraphic Bibliography and the Photographic Database. The Epigraphic database contains over 40.000 inscriptions and thus includes most of the especially noteworthy inscriptions published outside the main editions. The bibliography is stored in a separate database, the Epigraphic Bibliography with more than 10.000 records. The existence of drawings and photographic documentation, e.g. from the collection of the Photographic Library, widens the source of information, which may be made use of.