DBpedia

DBPedia is a database of all the statistical data in Wikipedia and other similar wiki sources.

Ontology

The DBpedia Ontology is a shallow, cross-domain ontology, which has been manually created based on the most commonly used infoboxes within Wikipedia. The ontology currently covers over 170 classes which form a subsumption hierarchy and has 940 properties.

• The DBpedia Ontology: http://wiki.dbpedia.org/Ontology

API

SPARQL Endpoint

EXAMPLE - [ Looking for Software] (Nouns)

 http://dbpedia.org/snorql/?query=SELECT+*+WHERE+{%0D%0A%3Fsubject+dbpedia2:wordnet_type+<http://www.w3.org/2006/03/wn/wn20/instances/synset-software-noun-1>.%0D%0A%3Fsubject+rdfs:label+%3Flabel.%0D%0A%3Fsubject+rdfs:comment+%3Fabstract.%0D%0AFILTER+(lang(%3Flabel)+%3D+"en"+%26%26+lang(%3Fabstract)+%3D+"en")%0D%0A}+LIMIT+100

• DBpedia - SPARQL endpoint (provided by Virtuoso): http://dbpedia.org/sparql
• SPARQL Explorer for DBpedia SPARQL endpoint: http://dbpedia.org/snorql/
• DBpedia iSparql - Metadata visualizer: http://dbpedia.org/isparql/

Mobile

DBpedia Mobile maps DBpedia locations and allows users to explore background information about them by navigating into DBpedia and other interlinked datasets such as GeoNames, Revyu, EuroStat and Flickr. Supports 14 languages and various filters.

• DBpedia Mobile: http://wiki.dbpedia.org/DBpediaMobile
• ProgrammableWeb - DBpedia Mobile API: http://www.programmableweb.com/mashup/dbpedia-mobile

Lookup

Lookup helps you find the nearest DBpedia IDs related to a certain specific keyword.

• DBpedia Lookup: http://wiki.dbpedia.org/Lookup

EXAMPLE:

http://lookup.dbpedia.org/api/search.asmx/KeywordSearch?QueryClass=company&QueryString=Television

Spotlight

Spotlight enables you to annotate or disambiguiate text, which could be useful for search, NLP and other IR tasks.

• DBpedia Spotlight: http://dbpedia.org/spotlight

EXAMPLE:

http://spotlight.dbpedia.org/rest/annotate?text=President%20Barack%20Obama%20called%20Wednesday%20on%20Congress%20to%20extend%20a%20tax%20break%20for%20students%20included%20in%20last%20year%27s%20economic%20stimulus%20package,%20arguing%20that%20the%20policy%20provides%20more%20generous%20assistance.&confidence=0.25&support=20

Tools

• DBpedia - Faceted Search: http://wiki.dbpedia.org/FacetedSearch | TV/rdf-type:Company/industry:Multimedia/?fc=30 EXAMPLE - Mobile TV companies producing multimedia
• DBpedia Navigator: http://navigator.dbpedia.org/
• DBpedia Relationship Finder: http://www.visualdataweb.org/relfinder/relfinder.php
• Lupedia enrichment service: http://lupedia.ontotext.com/

Resources

• DBpedia - data downloads: http://wiki.dbpedia.org/Downloads
• DBpedia - Ontology Mappings -- Classes: http://mappings.dbpedia.org/index.php?title=Special%3AAllPages&from=&to=&namespace=200
• CIA World Factbook as SPARQL Endpoint: http://www4.wiwiss.fu-berlin.de/factbook/

Tutorials

• Querying DBpedia: http://www.snee.com/bobdc.blog/2007/11/querying-dbpedia.html
• SPARQL Query In Code -- REST, PHP And JSON [TUTORIAL]: http://johnwright.me/blog/sparql-query-in-code-rest-php-and-json-tutorial/
• Build Wikipedia query forms with semantic technology: http://www.ibm.com/developerworks/xml/library/x-wikiquery/?ca=dgr-lnxw9dSPARQL-DBpedia&S_TACT=105AGX59&S_CMP=grlnxw9d

External Links

• wikipedia: DBpedia
• DBpedia project: http://dbpedia.org
• Accessing the DBpedia Dataset over the Web: http://wiki.dbpedia.org/OnlineAccess#h28-4
• The DBpedia Data Set Manual: http://wiki.dbpedia.org/Datasets?v=lbf#h18-7
• DBpedia Installation on Virtuoso EC2 AMI instance: http://virtuoso.openlinksw.com/dataspace/dav/wiki/Main/VirtEC2AMIDBpediaInstall
• DBPedia 3.1 launched (About DBPedia): http://dbpedia.org/About
• DBpedia 3.3 released: http://blog.dbpedia.org/2009/07/03/dbpedia-33-released/

See Also

Wikipedia | Wikidata | Semantic Web | SPARQL | RDF