AW: AW: Visual exploration of linked data with the Information Workbench and Microsoft Pivot from Peter Haase on 2010-03-26 (semantic-web@w3.org from March 2010)

From: Peter Haase <peter.haase@fluidops.com>
Date: Fri, 26 Mar 2010 22:12:58 +0100
To: "'Kingsley Idehen'" <kidehen@openlinksw.com>
Cc: <public-lod@w3.org>, <semantic-web@w3.org>
Message-ID: <4bad235b.0f975e0a.0c79.ffffa3ba@mx.google.com>

> Peter,
> 
> Are you able to implement a pattern similar to RelFinder where the
> SPARQL endpoints are configurable? We also do something similar re. our
> iSPARQL tool (i.e., have a list of known endpoints but leave the user
> with option to add others).
> 
> I've played around extensively with Pivot (your stuff and ours), so I
> am
> very interested in a loosely coupled solution.
> 

Yes, in our system one can define ad hoc federations across multiple SPARQL
endpoints. 
However, the performance in such a loosely coupled scenario is - not
surprisingly - orders of magnitude worse than in a centralized scenario,
especially when the queries involve joins across multiple SPARQL endpoints.
We are working on improving this situations as well ;-)

Regards,
Peter

Received on Friday, 26 March 2010 21:13:35 UTC