Hello All,
Whats the best way to convert sparql to SQL using R2RML mappings
and convert resultset from DB to RDF?
Thanks
--
Kjairam
Sent with Airmail
Hey,
have you tried D2RQ? http://d2rq.org
Martynas
On Sun, Mar 30, 2014 at 11:37 AM, Kamalraj Jairam
kjai...@semanticsoftware.com.au wrote:
Hello All,
Whats the best way to convert sparql to SQL using R2RML mappings
and convert resultset from DB to RDF?
Thanks
--
Kjairam
Sent with
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
kjai...@semanticsoftware.com.au wrote:
Hello All,
Whats the best way to convert
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
On Sun, 2014-03-30 at 09:37 +, Kamalraj Jairam wrote:
Hello All,
Whats the best way to convert sparql to SQL using R2RML mappings
and convert resultset from DB to RDF?
What are the givens? Do you have existing SPARQL text written against
some RDF produced by some existing R2RML
Hello All,
This is what i’m trying to do.
Loading data from a legacy database like DB2 or Oracle to Triple Store takes a
long time (Its an OLTP DB)
I’m firing some federated quries which needs to hit the database directly and
retrieve the results.
So, i need some process where sparql can be
Hello Paul,
These are the informtion i have
1) R2RML mapping for existing DB
2) I have some fedreated queries which hit the triple store containg the data
which has been loaded from the DB
The Loading data from DB (100 tables, millions of rows) to TS takes a long
time. I need a framework to
as mentioned D2RQ maps data from SQL to RDF so that SPARQL statements can
execute against the SQL data. It can also be used to extract the
relational data as RDF. The newest versions are supposed to do updates of
the SQL as well, but I have not played with those versions. In the cases I
had
There are also commercial options, e.g. this:
http://www.revelytix.com/content/spyder
On Sun, Mar 30, 2014 at 10:15 PM, Kamalraj Jairam
kjai...@semanticsoftware.com.au wrote:
Hello Paul,
These are the informtion i have
1) R2RML mapping for existing DB
2) I have some fedreated queries which
Hi,
I hear that using named models are best practice. But I can't find any
examples in the new Jena tutorials. Would it be to recommendable to keep a
reference to the data set and then create a named model using:
Dataset ds = TDBFactory.createDataset(datase/t);
Model model =
There is also Sparqlify[1], which we use for exposing OpenStreetMap as LinkedData in the
LinkedGeoData project[2] (and dumpig the RDF for downloads)[3].
Unfortunately, R2RML support not yet totally stable; we wrote our mappings[4] in what we
refer to as Sparqlification Mapping Language (SML)
If you want a commercial tool, please take a look at our tool, Ultrawrap:
http://capsenta.com/ultrawrap/
Juan Sequeda
+1-575-SEQ-UEDA
www.juansequeda.com
On Sun, Mar 30, 2014 at 3:10 PM, Kamalraj Jairam
kjai...@semanticsoftware.com.au wrote:
Hello All,
This is what i’m trying to do.
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