Digital transformation has resulted in the availability of more data in higher quality and business models aiming at exploiting them, both on the level of individual enterprises and digital ecosystems. Among the essential elements of business models are the value offering made to target groups and the value creation required for this. Using the example of the maritime dataspace MARISPACE-X, the paper investigates an approach to support business model development combining data value chains with data sovereignty based on the FAIR principles as differentiating feature. The contributions of this paper are (1) an innovative dataspace as example case for business model development, (2) an approach to integrate FAIR principles into data value chains, and (3) analysis of existing literature in the field.