Under CopyrightMarten, F.F.MartenHammermeister, I.I.HammermeisterRingelstein, J.J.RingelsteinRequardt, B.B.RequardtBraun, M.M.Braun2022-03-1412.6.20192019https://publica.fraunhofer.de/handle/publica/40464310.24406/publica-fhg-404643In this paper, it is investigated if an exchange of grid-related data in TSO/DSO system use cases of the EU-project TDX-ASSIST can be sufficiently performed with the CIM-CGMES version 2.4.15 data model. For those use cases which cannot be mapped onto CGMES, novel extensions of the data model are proposed. The proposals are a work in progress state and will be finalized in the upcoming deliverables of TDX-ASSIST. Our work aims at a wide usage of CGMES to exchange grid-related data.enpresentation