New website. Coinciding with the v0.8 release, we have overhauled the website and much of the documentation, and made d2rq.org the official homepage of both D2RQ and D2R Server.
SPARQL/Update Extension released. Vadim Eisenberg has released a D2RQ/Update and D2R/Update Server Extension to the D2RQ Framework which allows you to use SPARQL/Update to change/delete/add data to a D2R-mapped relation database. D2RQ/Update uses the same mapping used by D2RQ, no additional information is required. The extension takes into account the database constraints, such as primary/foreign keys and non-nullable columns. A tutorial on how to use the extension is available here. 2010-11-29
Version 0.7 released. This version provides several bugfixes, better dump performance, several new features as well as new optimizations that must be enabled via D2R Server's --fast switch or using d2rq:useAllOptimizations. 2009-08-10
D2RQ Engine v0.6 and D2R Server v0.6 have been released. The new releases provide significantly improved performance (up to factor 7 in the BSBM benchmark) thanks to improved rewriting of SPARQL statements into SQL, as well as a new ARQ-based QueryEngine. The D2RQ release improves memory usage and fixes various bugs. In addition to MySQL, it has also been sucessfully tested on Oracle. The new D2R Server release features support for dereferencing vocabulary URIs and for publishing mappings between different vocabularies. 2009-02-19
The D2RQ Engine V0.5.1 and D2R Server V0.4 have been released. The new releases fix multiple bugs in the D2RQ Engine and allow D2R Server to be deployed within servlet containers. 2007-10-25
D2R Server Version 0.3.2 released, featuring more configurability, easy installation as a Windows service, and many small improvements and bugfixes. 2007-02-13
D2RQ V0.5 released. The new release supports SPARQL and includes a automatic mapping generator, a dump-rdf command line script, a Jena Assembler for D2RQ models. It is compatible with Jena 2.4 and ARQ 1.4 and provides improved compatibility with MySQL, Oracle and PostgreSQL. We also updated the D2RQ User Manual to reflect all new features. 2006-10-30
D2R Server Version 0.3 released. The new release enables database-generated URIs to be dereferenced. This allows the content of relational databases to be browsed with tool like Tabulator. 2006-09-08
D2RQ in TopBraid Composer. D2RQ has been integrated into the TopBraid Composer ontology editor. Using TopBraid Composer you can browse D2RQ-mapped database content in a nice GUI, and use a professional RDF editor to customize D2RQ mapping files. See TopBraid Composer documentation for details. 2006-08-09
Introducing D2R Server. We are currently working on D2R Server. D2R Server provides SPARQL access to relational databases. The server takes SPARQL queries from the Web and rewrites them via a D2RQ mapping into SQL queries against a relational database. There will be a talk about D2R Server in the Developers Track at WWW 2006. 2006-05-09
D2RQ 0.4 has been published. The new version contains a wrapper which allows you to use D2RQ together with the Sesame Semantic Web framework. 2005-10-25
New d2rq-map-devel mailing list. As the D2RQ user community is growing and we are receiving an increasing number of support requests and interesting new ideas around the toolkit and database to RDF mapping in general, we have opened up a D2RQ and D2R mailing list. 2005-10-13
D2RQ 0.3 has been published. The new version includes an experimental D2RQQueryHandler which speeds up complex RDQL queries significantly by rewriting groups of RDQL patterns into single SQL statements and by rewriting RDQL AND conditions into SQL WHERE clauses. 2005-04-29