My experience with d2rq was that expecting efficient execution was not always likely since sparql and SQL have likely impedance mismatch. (Analogous to object relational mapping difficulties)
I found it very useful for schema and type discovery for importing. On Mar 30, 2014 12:53 PM, "Andy Seaborne" <[email protected]> wrote: > On 30/03/14 12:21, Martynas Jusevičius wrote: > >> Hey, >> >> have you tried D2RQ? http://d2rq.org >> > > +1 > > The development version has support for R2RML, I gather. > > >> Martynas >> >> On Sun, Mar 30, 2014 at 11:37 AM, Kamalraj Jairam >> <[email protected]> wrote: >> >>> Hello All, >>> >>> Whats the best way to convert sparql to SQL using R2RML mappings >>> >>> and convert resultset from DB to RDF? >>> >> > R2RML is not a rewrite of SPARQL to SQL. It is an RDF view of the SQL > data which can in turn be queried via SPARQL. D2RQ maps basic graph > patterns to SQL, the rest of SPARQL is handled in the client query engine. > > What exactly are you wanting to do? > > Andy > > >>> Thanks >>> >>> >>> >>> >>> -- >>> Kjairam >>> Sent with Airmail >>> >> >
