Tomas wrote:
> Hi,
>
> I have exactly the same idea, and the same problem... I have rdf
> stored in Sesame and I would like to use Exhibit to display this
> knowledge base in a user-friendly way.
>
> I think the performance problem would be solved using SPARQL and
> converting dynamically the results to a json file, but I don't find
> any tool that does it at runtime. Do you know about such a tool? I see
> that Ivan Hermann (http://www.ivan-herman.net/Misc/PythonStuff/SPARQL/
> Doc-SPARQL/SPARQL-module.html) had a similar approach using Python,
> but we are using Java.
>
> Any ideas?
>
First, you'd need an extension to SPARQL that actually supports
aggregate functions like COUNT. Actually, Sesame's SeRQL does have
COUNT, and MIN, MAX, GROUP BY. So, SeRQL is probably the better choice.
Backstage's code is here
http://simile.mit.edu/repository/backstage/trunk/
It might not work out of the box but you could get some hints for how to
architecture the faceted browsing engine.
David
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