Leibniz Institute for the German Language (IDS Mannheim)
IDS Mannheim replaced its ageing Fedora Commons research-data repository — previously CoreTrustSeal-certified and part of the CLARIN infrastructure — with one built on InvenioRDM, after rejecting an upgrade to Fedora 4 because it dropped OAI-PMH support. Handling large linguistic corpora (one version reached about 1.1 TB across roughly 31,500 files), the team bypassed InvenioRDM's web deposit UI and built an external Java ingest framework, corpus-services-ng, that packages data and drives ingest through the REST API. To stay CLARIN-compliant they also had to serve CMDI metadata, which InvenioRDM does not support natively. An experience report documents the build.