This online database is issued under the auspices of the Swiss Institute of Art Science (SIK-ISEA). The catalogue raisonné is still incomplete, but currently lists over 2,400 works. The catalogue raisonné can be searched under the "Datenbank" section of the Website. It can be searched by title, keyword, medium, materials, or date. The catalogue includes a biography and a bibliography, as well as lists of exhibitions, recordings and exhibition documents.