@mwiegand if we are into interesting (re-)engineerings concerning text files I can add the case of a MySQL Dump being imported into H2 …
I think the most transferable file format still is Parquet. Another one might be ORC though with KNIME not exactly as flexible. Also SQLite and H2 are quite common to exchange information. But admittedly they are not text-only. KNIME itself supports a very wider arrange of data formats that you will not see in most other applications.
