SPARQL Query Tool

SPARQL is an RDF query language, it able you to retrieve results set based on your conditions from an RDF file (such as Tuertle file(s)) or from a SPARQL endpoint (such dbpedia which stores data from Wikipedia web site).
You can imagine what can you retrieve from a rich data web site such as Wikipedia, for example the following SPARQL query will retrieve all triples from Wikipedia web site where "Jordan" is the subject for all these triples:

select ?xlabel ?ylabel
where
{
:Jordan ?x ?y.
?x rdfs:label ?xlabel.
?y rdfs:label ?ylabel.
FILTER(lang(?xlabel) = "en")
FILTER(lang(?ylabel) = "en")
}


you can try this example or other examples on the dbpedia endpoint web query explorer at the following link:
http://dbpedia.org/snorql/

There are several SPARQL query tool to execute SPARQL queries and retrieve the results set such as Twinkle and Jena. Each of these tools has a lot of advantages and some disadvantages, we have developed a new SPARQL query tool that combines the advantages for these tools and avoid the disadvantages.

you can find more about our SPARQL query tool here:
http://programmervision.blogspot.com/p/sparql-query-tool.html


Actually, when you work on semantic web field you already work on the feature of the web.