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Re: ANN: Sparallax! - Browse sets of things together (now those on your SPARQL endpoint)

From: Danny Ayers <danny.ayers@gmail.com>
Date: Thu, 18 Aug 2011 01:03:25 +0200
Message-ID: <CAM=Pv=TZh05BHk2xmWMBWw-FC5G1OV49wjM16=MSewzr3Aot2Q@mail.gmail.com>
To: Giovanni Tummarello <giovanni.tummarello@deri.org>
Cc: Semantic Web at W3C <semantic-web@w3.org>, Linking Open Data <public-lod@w3.org>, Andy Seaborne <andy.seaborne@gmail.com>
Nice work!

> Due to requirements of query functionalities and aggregates, Sparallax
> currently only works on Virtuoso SPARQL endpoints. (do other
> triplestores have aggregates? if so please let us know and we'll try
> to support other syntaxes as well)

Which aggregate functions are needed?
ARQ has some support (very possibly more than) listed here:
http://jena.sourceforge.net/ARQ/group-by.html

[Andy, are there any more query examples around? I can't seem to get
count(*) working here]

I see there are Graph and Dataset fields on the form - how are they
used? What happens with an endpoint that only has a default, unnamed
graph?

> Try sparallax on our test datasets or put just the URL of your SPARQL
> endpoint (but make sure you have materialized your RDFs triples, it's
> needed)

materialized?

(I assume that's not the httpRange-14 extension for dogs :)

What else can be done to the data to make it more Sparallax friendly?

I noticed clues in the form boxes for abstractprop and imageprop, also
the config file -

http://code.google.com/p/freebase-parallax/source/browse/app-parallax/sparallax/scripts/config.xml

Do I take it from the rdfs:Class entry there that it uses RDFS to
decide on collections?

Sorry for the raft of questions, but I recently put LD browser on my
todo list, completely forgetting about Parallax and all the boxes that
already ticks, and now Sparallax... so I want to get an idea of how it
works to avoid reinventing the wheel (in a square shape).

Cheers,
Danny.





-- 
http://dannyayers.com
Received on Wednesday, 17 August 2011 23:04:05 UTC

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