The current live instance of DBpedia has just received dose #1 of a series
of planned "Context" oriented
booster shots. These shots seek to to protect DBpedia from contextual incoherence as it
grows in data set
expanse and popularity. Dose #1 (vaccine label: Yago) equips DBpedia with a functional (albeit non
exclusive) Data Dictionary component courtesy of the Yago Class Hierarchy
When the DBpedia & Yago integration took
place last year (around WWW2007, Banff) there was a little, but
costly omission that occurred: nobody sought to load the Yago Class Hierarchy
into the Virtuoso's Inference
Anyway, the Class Hierarchy has now been loaded into the
Virtuoso's inference engine (as Virtuoso Inference Rules) and the following
queries are now feasible using the live Virtuoso based DBpedia instance hosted by OpenLink
-- Find all Fiction Books associated with a property
"dbpedia:name" that has literal value: "The Lord of the
-- Variant of query with Virtuoso's Full Text Index extension via the
bif:contains function/magic predicate
SELECT DISTINCT ?s
FROM < xmlns="http"
?s dbpedia:name ?n
?n bif:contains 'Lord
-- Retrieve all individuals instances of Fiction Class which
should include all Books.
Note: you can also move the inference pragmas to the Virtuoso Sever side i.e place the inference
rules in a server instance config file, thereby negating the need
to place "define input:inference
directly in your SPARQL queries.
About this entry:
Author: Kingsley Uyi Idehen
Published: 06/05/2008 17:11 GMT-0500
Modified: 07/13/2010 10:45 GMT-0500
Tags: webservices , rdf , linked_data , semanticweb , sparql , openlink , virtuoso , DataSpace
Categories: Virtual Database ,
Semantic Web ,
Web Services (Web 2.0)
Comment Status: 1
I know this post is a bit outdated, but I was wondering if it is
still possible to send this kind of queries on the dbpedia sparql
endpoint, since i tried with your first example but had no
This document is empty and basically useless. It is generated by a web service that can make some statements in HTML Microdata format.
This time the service made zero such statements, sorry.