Jena is Java toolkit for developing semantic web applications based on W3C recommendations for RDF and OWL. It provides an RDF API ARP, an RDF parser SPARQL, the W3C RDF query language an OWL API and rule-based inference for RDFS and OWL. -Jena is

这是一个将数据库数据转换成sparql查询的工具，很强大！-This is a tool to convert the data into a query sparql, very powerful!