# Package org.eclipse.emf.facet.efacet.core.query

Interface Summary
IQueryCollectionImplementation: This interface can be implemented by EMF Facet query implementations that want to handle multiple evaluation themselves, presumably to improve the performance of the evaluation.
IQueryImplementation: Interface implemented by all EMF Facet query evaluators.
IQueryImplementationFactory: This factory allows clients to create a `IQueryImplementation` for queries corresponding to this type of factory.