W3C home > Mailing lists > Public > public-lod@w3.org > August 2008

Re: soliciting your favorite (public) SPARQL queries!

From: Kingsley Idehen <kidehen@openlinksw.com>
Date: Thu, 21 Aug 2008 08:53:50 -0400
Message-ID: <48AD655E.6090107@openlinksw.com>
To: Lee Feigenbaum <lee@thefigtrees.net>
CC: public-sparql-dev@w3.org, public-lod@w3.org

Lee Feigenbaum wrote:
> Hi everyone,
> I'm putting together a "SPARQL by Example" tutorial, which is, as the 
> name suggests, a step-by-step introduction to SPARQL taught almost 
> entirely through complete, runnable SPARQL queries.
> So far, I've gathered a great deal of example queries myself, but I 
> know that many subscribers to these lists probably have favorite 
> queries of their own that you might be willing to share with me.
> I'm looking for:
> 1) SPARQL queries
> 2) ...that can be run by anyone (no private data sets)
> 3a)...either by running the query against a public SPARQL endpoint
> 3b)...or by using a public SPARQL endpoint that will fetch 
> HTTP-accessible RDF data (e.g. sparql.org or demo.openlinksw.com)
> 4) ...that answers a real* question
> 5) ...and that is fun!**
> * real is in the eye of the beholder, I imagine, but I'm not looking 
> for  "finds the predicates that relate ex:s and ex:o in this sample 
> RDF graph"
> ** fun is also in the eye of the beholder. fun can be a query on fun 
> data; a clever query that may illustrate a particular SPARQL construct 
> ("trick"); a query that integrates interesting information; a query 
> with surprising results; etc.
> thanks to anyone who is able to contribute!
> Lee
> PS I plan to make the tutorial slides available online under an 
> appropriate CC license once they are completed.

Here are our contributions (endpoint: http://demo.openlinksw.com/sparql):

1. http://virtuoso.openlinksw.com/dataspace/dav/wiki/Main/NorthWindREF  
- against live RDF Views of Northwind SQL Database (Products, Customers, 
Orders etc.)

2. http://virtuoso.openlinksw.com/dataspace/dav/wiki/Main/ODSSIOCRef - 
collection of SPARQL queries against SIOC based exploration of OpenLink 
Data Space s blogs, wikis, bookmarks, calendars, feed subscriptions etc..)

3. http://virtuoso.openlinksw.com/dataspace/dav/wiki/Main/ODSFOAFRef - 
collection of SPARQL queries for FOAF navigation of OpenLink Data Spaces

4. http://virtuoso.openlinksw.com/dataspace/dav/wiki/Main/ODSSKOSRef - 
collection of SPARQL queries for SKOS based exploration of Tag Spaces 
associated with OpenLink Data Spaces

5. http://virtuoso.openlinksw.com/dataspace/dav/wiki/Main/SIOCRefDocs- 
collection of SPARQL queries using SIOC to explore Virtuoso's Online 
Docs Data Space

- SPARQL queries for exploring Wordpress Data when Deployed via 
Virtuoso's PHP runtime hosting

- ditto re. MediaWiki

8. http://virtuoso.openlinksw.com/dataspace/dav/wiki/Main/PHPBB3SIOCRef 
- ditto phpBB

9. http://virtuoso.openlinksw.com/dataspace/dav/wiki/Main/DrupalSIOCRef 
- ditto Drupal

10. http://www4.wiwiss.fu-berlin.de/benchmarks-200801/#queries - DBpedia 
Benchmark Queries (* run against the DBpedia SPARQL endpoint at: 
http://dbpedia.org/sparql *)

11. http://tinyurl.com/5fjp5h - Collection of Inference based Queries 
against DBpedia that leverage the Yago Class Hierarchy

Note: re. the ODS examples (items 2 - 4 ), if you change the SPARQL 
endpoint to: <http://community.linkeddata.org/sparql> , and Graph IRI in 
the SPARQL FROM clause to: <http://community.linkeddata.org/sparql>, you 
can then run the SIOC, FOAF, SKOS examples against the live LOD Data 
Space with more interesting results.



Kingsley Idehen	      Weblog: http://www.openlinksw.com/blog/~kidehen
President & CEO 
OpenLink Software     Web: http://www.openlinksw.com
Received on Thursday, 21 August 2008 12:54:29 UTC

This archive was generated by hypermail 2.4.0 : Friday, 17 January 2020 16:20:41 UTC