Kingsley Idehen's Blog Data Space

Virtuoso joins Boca and ARC 2.0 as RDF Quad or Triple Stores with Full Text Index extensions to SPARQL. Here is our example applied to DBpedia:

PREFIX dbpedia: <http://dbpedia.org/>
PREFIX foaf: <http://xmlns.com/foaf/0.1/>
PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
SELECT ?name ?birth ?death
FROM <http://dbpedia.org>
WHERE {
   ?person dbpedia:birthplace <http://dbpedia.org/resource/Berlin> .
   ?person dbpedia:birth ?birth .
   ?person foaf:name ?name .
   ?person dbpedia:death ?death
   FILTER (?birth < "1900-01-01"^^xsd:date and bif:contains (?name,
'otto')) .
}
ORDER BY ?name

You can test further using our SPARQL Endpoint for DBpedia or via the DBPedia bound Interactive SPARQL Query Builder or just click *Here* for results courtesy of the SPARQL Protocol (REST based Web Service).

Note: This is in-built functionality as Virtuoso has possessed Full Text Indexing since 1998-99. This capability applies to physical and virtual graphs managed by Virtuoso.

A per usual, there is more to come as we now have a nice intersection point for SPARQL and XQuery/XPath since Triple Objects (the Literal variety) can take the form of XML Schema based Complex Types :-) A point I alluded too in my podcast interview with Jon Udell last year (*note: mechanical turk based transcript is bad*). The point I made went something like this: "...you use SPARQL to traverse the typed links and then use XPath/XQuery for further granular access to the data if well-formed..."

Anyway, the podcast interview lead to this InfoWorld article titled: Unified Data Theory.