Sail is an RDF triple/quad store interface developed by OpenRDF. Any database the implements the Sail interfaces properly is a valid RDF triple/quad store. A graph database is a great way to build a triple/quad store because its possible to mix indexing and graph traversals to solve the RDF “pattern match” problem.
Welcome to TuQS! Turnguard's QuadStore is the first draft of an own implementation of a QuadStore with main focus on data-retrieval speed. TuQS can be queried and updated using openrdf's SAIL API. Please choose a repository here. * Features o SAIL accessible o True QuadStore with GraphSupport o HighSpeed regex SPARQL filters o Userrights on TripleBasis o Extendable to a QuintStore (or more generally to an n-Store) o Cachable SPARQL Queries for further speed improvement o Clusterable o Federationable o FullTextSearchable
R. Angles, и C. Gutierrez. The Semantic Web: Research and Applications, том 3532 из Lecture Notes in Computer Science, Springer Berlin Heidelberg, (2005)