In this paper we propose a solution of how to publish and visualize Inter-net-based sustainability reports. After the Global Reporting Initiative (GRI) published the final version of the third generation of GRIguidelines more and more organizations start to publish sustainability reports on their Internet sites. But these reports are split by environmental topics. Readers are confronted by an in-formation flood without understanding the relationships between all topics in an organization. With the usage of the eXtensible Business Reporting Language (XBRL) we propose a solution of how to transform sustainability reports into Topic Maps (XTM).