Library material will continue to be available in the regularly updated respective electronic catalogues of the History and the Music History. Presumably mid-2020, the complete holdings of the library will be incorporated in an integrated OPAC that currently contains catalogue data of new entries from the beginning of 2018 and retroconverted materials from mid-2017.
The library pertains to the Südwestdeutscher Bibliotheksverbund library system (SWB) and the catalogue K10plus-Verbundkatalog will gradually include its complete collection. Journals held by the DHI will be inserted in the Zeitschriftendatenbank (ZDB – Journal Data Base) and in the Elektronische Zeitschriftenbibliothek (EZB – Electronic Journal Library).

In Rome the DHI is part of the Urbis Library Network, which brings together various international institutions, and its metacatalogue.