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It surprises me that the Semantic Technology industry still talks with great frequency about the ‘SPARQL Endpoint’ (it’s come up a few times already at SemTech 2013). At best, a S…
Mac GUI for SPARQL queries.
Apache Marmotta - An Open Platform for Linked Data - LDPath Query Language
SPARQL by Example SPARQL by Example is a SPARQL tutorial created by W3C SPARQL Working Group co-chair Lee Feigenbaum and W3C team member Eric Prud’hommeaux. NOTE: We intend to update this tutorial in the next couple of months. If you have suggestions, please let us know. SPARQL Cheat Sheet from LeeFeigenbaum
Honest look at where RDF falls down on the job.
One thing you realize pretty quickly is that it is very hard to work with Linked Data and just confine oneâs explorations to a single site or data set. The links inevitably lead you on a pilgrimage from one data set to another and another. In the case of the WorldCat Discovery API, my pilgrimage led me from WorldCat to id.loc.gov, FAST and VIAF and from VIAF on to dbpedia. Dbpedia is an amazingly fun data set to play with. Using it to provide additional richness and context to the discovery experience has been enlightening.
2015-11-25: You can find a much richer revised version of this lesson at The Programming Historian
whenever i start using sql i tend to throw a couple of exploratory statements at the database in order to understand what is avaliable, and what form the data takes.
eg.
show tables
describe tab...
eg.
show tables
describe tab...
Linked data tools for the semantic web. Free resources for RDF and OWL.
These slides introduce SPARQL, the ‘SELECT’ query in SPARQL, and show how you can use relatively straightforward SELECT queries on the British Library’s BNB (B…
SQLZoo for SPARQL.
DDC released as linked data. SPARQL endpoint at http://dewey.info/sparql.php