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
Kowari is an Open Source, massively scalable, transaction-safe, purpose-built database for the storage, retrieval and analysis of metadata. Kowari is written in Java. Kowari supports RDF and OWL metadata.
DERI researchers have developed a new high-speed RDF search engine capable of answering search queries with more than seven billion RDF statements in mere fractions of a second.
A. Harth, J. Umbrich, A. Hogan, and S. Decker. Proceedings of the 6th International Semantic Web Conference and 2nd Asian Semantic Web Conference (ISWC/ASWC2007), Busan, South Korea, volume 4825 of LNCS, page 211--224. Berlin, Heidelberg, Springer Verlag, (November 2007)