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YARS is a data store for RDF in Java and allows for querying RDF based on a declarative query language, which offers a somewhat higher abstraction layer than the APIs of RDF toolkits such as Jena or Redland. YARS uses Notation3 as a way of encoding facts and queries. The interface for interacting with YARS is plain HTTP (GET, PUT, and DELETE) and is built upon the REST principle. Much more information can be found on the YARS wiki. The main requirement for YARS is to enable fast storage and retrieval of large amounts of RDF (in the order of millions of triples) while keeping a small footprint and a lightweight architecture approach.