# Package org.eclipse.viatra.query.runtime.registry.connector

- Class Summary
  Class | Description
  --- | ---
  AbstractRegistrySourceConnector | Abstract registry source connector implementation that stores the identifier and listener set.
  QueryGroupProviderSourceConnector | Source connector implementation that uses a `IQueryGroupProvider` to provide a query specifications into the registry.
  SpecificationMapSourceConnector | A simple connector implementation that allows users to simply add and remove specifications.