"Open Access to Humanities data: the DARIAH e-infrastructure for the Arts and Humanities" Heiko Tjalsma is a "senior expert research data" at DANS (Data Archiving and Networked Services), an institute of the Royal Netherlands Academy of Arts and Sciences (KNAW) and the Netherlands Organization for Scientific Research (NWO). He studied social and economic history at Leiden University and at the University of Cambridge (UK). Before DANS he mainly worked at the Netherlands Historical Data Archive. One of his present fields of attention are access conditions, licensing and the legal aspects of trusted digital repositories. He is involved in the CESSDA Preparatory Phase Project (Work Package on Data collection, dissemination and access issues) as well as the DARIAH project (Legal Work Package).