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Frequently Asked Questions

General​

What is OpenGIN?​

OpenGIN is a platform for building time-aware digital twins using a polyglot database architecture.

Why does it use three databases?​

OpenGIN leverages the strengths of multiple databases:

  • MongoDB: For flexible, schema-less metadata.
  • Neo4j: For handling complex relationships and graph traversals.
  • PostgreSQL: For storing time-series attributes and ensuring ACID compliance for structured data.

Technical​

How do I reset the databases?​

You can stop the containers and remove the volumes:

docker-compose down -v

Then start them up again:

docker-compose up -d

Can I add my own Entity types?​

Yes, Entities are flexible. You define the Kind (Major/Minor) and the system adapts. You don't need to pre-define schemas in the database.