Despite covering specific scientific disciplines, all NFDI consortia share similar concepts such as organizations, people, institutions, areas of expertise, data repositories, projects, data sets, and research (meta)data, just to name a few. When interconnected, such information has the potential to open up new research horizons. To achieve this, however, the data needs to be available as linked open data (LOD). Hence a comprehensive workflow, which includes data discovery, harvesting, preprocessing, mapping, and integration into a knowledge graph is required, which is the topic of the present work.