Hi Julien, 1) I just uploaded a new preview that fixes a bunch of issues.
2) The code for the preview is already in the Git repository. It is in the "develop" branch. This branch will supersede all the other branches once it is stable. Best, Richard On 5 Dec 2012, at 15:07, <[email protected]> <[email protected]> wrote: > Congrats Richard !! I waited this version (even in preview) with impatience. > > With some tests I can tell that D2RQ engine is more efficient than before, > that's a really good thing :-) I will test also the R2RML support as soon as > possible and I will let you know of these tests ;-) > > By the way, i have a question, the Git repository will be updated soon with > this preview version ? Or this version in preview will be only available in > download ? > > Congrats again :-) > > Best, > > Julien Plu. > > -----Message d'origine----- > De : Richard Cyganiak [mailto:[email protected]] > Envoyé : mardi 4 décembre 2012 23:41 > À : d2rq-map-devel (E-mail) > Objet : [d2rq-dev] Preview of R2RML support; new D2RQ engine > > Hi all, > > A preview build of a D2RQ version with R2RML support is available on the > download page. > https://github.com/d2rq/d2rq/downloads > > IMPORTANT: This is a preview only, and in no way ready for anything > resembling production use. > > > R2RML is W3C's new standard database-to-RDF mapping language. For more on > R2RML, see here: > http://www.w3.org/TR/r2rml/ > > In this D2RQ preview version, R2RML mappings can be used with dump-rdf, > d2r-server and d2r-query, using the usual syntax. D2RQ will detect whether > the mapping file is using R2RML or the "normal" D2RQ mapping language. > > This preview still has many known limitations. Most notably, SPARQL > evaluation is dead slow, as a naive translator is used. The generate-mapping > tool cannot produce R2RML yet. Also, rr:RefObjectMap not yet implemented. > > > This version also includes a major, not yet quite completed, rewrite of the > D2RQ engine. The goals of this rewrite were: > > 1. Supporting both R2RML and the D2RQ mapping language in a single engine > > 2. Making information about column datatypes and about > primary/unique/foreign keys available throughout the engine so that we can > do a better job at query optimization in future releases > > 3. Enable support for nested SQL queries so that we can do a better job at > translating nested SPARQL language features in future releases > > 4. Remove eight years of cruft from the codebase :-) > > Aside from the R2RML support, this rewrite offers little immediate benefit > to users, but it removes some design flaws and limitations from the codebase > that have held us back, and it should pay off handsomely in the mid-term. > > > The source code is in the new "develop" branch on GitHub. > > > Work on the R2RML implementation is part of a collaboration with UCB: > http://www.ucbpharma.co.uk/_up/ucbpharma_co_uk/documents/UCB_DERI.pdf > > > All the best, > Richard > ---------------------------------------------------------------------------- > -- > LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial Remotely > access PCs and mobile devices and provide instant support Improve your > efficiency, and focus on delivering more value-add services Discover what IT > Professionals Know. Rescue delivers http://p.sf.net/sfu/logmein_12329d2d > _______________________________________________ > d2rq-map-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/d2rq-map-devel > > > ------------------------------------------------------------------------------ > LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial > Remotely access PCs and mobile devices and provide instant support > Improve your efficiency, and focus on delivering more value-add services > Discover what IT Professionals Know. Rescue delivers > http://p.sf.net/sfu/logmein_12329d2d > _______________________________________________ > d2rq-map-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/d2rq-map-devel ------------------------------------------------------------------------------ LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial Remotely access PCs and mobile devices and provide instant support Improve your efficiency, and focus on delivering more value-add services Discover what IT Professionals Know. Rescue delivers http://p.sf.net/sfu/logmein_12329d2d _______________________________________________ d2rq-map-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/d2rq-map-devel
