Initial concept for metadata exchange between nfdi.software and other Base4NFDI services Deliverable D3.2 for nfdi.software NFDI Base project Castro, Leyla Jael1[0000-0003-3986-0510], Bleier, Arnim2, Baum, Roman1[0000-0001-5246-9351], Hagemeier, Björn3[0000-0003-1528-0933], Michels, Thorsten4[0009-0004-2497-7577], Pempe, Wolfgang5[0000-0002-3346-2215], Reinhardt, Martin6[0000-0002-1213-5135], Voß, Jakob7[0000-0002-7613-4123], Venkatesh, Suhasini1[0009-0005-7305-3052], Windeck, Jürgen8[0000-0003-1909-4353], Zacharias, Michael9[0000-0001-5801-3945] 1. ZB MED - Information Centre for Life Sciences 2. GESIS - Leibniz-Institute for the Social Sciences 3. Forschungszentrum Jülich 4. Rheinland-Pfälzische Technische Universität Kaiserslautern-Landau 5. DFN - Deutschen Forschungsnetzes e. V. 6. Leipzig University 7. Verbundzentrale des GBV 8. Technical University of Darmstadt 9. Universität Heidelberg Landessternwarte Königstuhl Abstract. Here we present our initial concept for metadata exchange with other Base4NFDI service. We first surveyed Base4NFDI projects to find out which Base projects would either consume or produce metadata for research software. Then conducted interviews with consumers and producers to figure out their needs based on common and distinctive metadata elements. Based on surveys and interviews, we present a diagram for a research software metadata exchange across Base4NFDI projects. Keywords. Research software, metadata, metadata exchange, interoperability