D:SWARM is a graphical web-based ETL modelling tool that serves to import data from heterogeneous sources with different formats, to map input to output schemata and design transformation workflows, to load transformed data into property graph database. It is developed in a collaborative project by SLUB Dresden (www.slub-dresden.de) and Avantgarde Labs GmbH (www.avantgarde-labs.de) features additional functionalities like exporting of data models as RDF and sharing mappings and transformation workflows.