These Cartridges handle closed formats — typically proprietary; sometimes undocumented; possibly licensed to no-one except the format originator. Sometimes data may not be parsed as desired or expected, as many of these Cartridges have required reverse-engineering of the data format in question.
- Virtuoso Sponger
- Configure Sponger Cartridges Guide
- The OpenLink Data Explorer Extension
- Meshups (links and lookups across Web 2.0 Services and LOD Cloud
- OpenLink-supplied Virtuoso Sponger Cartridges