d2rq-master.zip下载

d2rq.zip安装包,官网上下不下来的，我用github下下来的，需要的朋友可以下载。 D2RQ exposes the contents of relational databases as RDF. It consists of: The D2RQ Mapping Language. Use it to write mappings between database tables and RDF vocabularies or OWL ontologies. The D2RQ Engine, a SPARQL-to-SQL rewriter that can evaluate SPARQL queries over your mapped database. It extends ARQ, the query engine that is part of Apache Jena. D2R Server, a web application that provides access to the database via the SPARQL Protocol, as Linked Data, and via a simple HTML interface