Packages 
Package Description
org.eclipse.rdf4j.common.concurrent.locks
Package offering various locking scheme implementations.
org.eclipse.rdf4j.common.concurrent.locks.diagnostics  
org.eclipse.rdf4j.sail
RDF Storage And Inference Layer (RDF Sail): a set of interfaces defining an SPI for RDF databases.
org.eclipse.rdf4j.sail.config  
org.eclipse.rdf4j.sail.features  
org.eclipse.rdf4j.sail.helpers
Abstract base implementation and internal helper classes for Sail implementations.