DAS (Distributed AtomSpace) is an extension to Hyperon that allows the use of very large knowledge bases by offering a query API (fully integrated with MeTTa) that uses several internal cognitive components to improve query execution performance. The actual backend used to persist the knowledge base can be configured to use any DBMS or combination of DBMSs.
Go to this Github repo to see the code, user’s documentation and information on how to contribute to the project.