Re: ANN: DBpedia 3.2 release, including DBpedia Ontology and RDF links to Freebase

Chris Bizer wrote:
> Hi all,
>
> we are happy to announce the release of DBpedia version 3.2.  
>
> The new knowledge base has been extracted from the October 2008 Wikipedia
> dumps. Compared to the last release, the new knowledge base provides three
> mayor improvements:
>
>
> 1. DBpedia Ontology
>
> DBpedia now features 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 have 940 properties. The ontology is instanciated by a new
> infobox data extraction method which is based on hand-generated mappings of
> Wikipedia infoboxes to the DBpedia ontology. The mappings define
> fine-granular rules on how to parse infobox values. The mappings also adjust
> weaknesses in the Wikipedia infobox system, like having different infoboxes
> for the same class (currently 350 Wikipedia templates are mapped to 170
> ontology classes), using different property names for the same property
> (currently 2350 Wikipedia template properties are mapped to 940 ontology
> properties), and not having clearly defined datatypes for property values.
> Therefore, the instance data within the infobox ontology is much cleaner and
> better structured than the infobox data within the DBpedia infobox dataset
> that is generated using the old infobox extraction code. The DBpedia
> ontology currently contains about 882.000 instances.
>
> More information about the ontology is found at:
> http://wiki.dbpedia.org/Ontology 
>
>
> 2. RDF Links to Freebase
>
> Freebase is an open-license database which provides data about million of
> things from various domains. Freebase has recently released an Linked Data
> interface to their content. As there is a big overlap between DBpedia and
> Freebase, we have added 2.4 million RDF links to DBpedia pointing at the
> corresponding things in Freebase. These links can be used to smush and fuse
> data about a thing from DBpedia and Freebase.
>
> For more information about the Freebase links see:
> http://blog.dbpedia.org/2008/11/15/dbpedia-is-now-interlinked-with-freebase-
> links-to-opencyc-updated/
>
>
> 3. Cleaner Abstacts
>
> Within the old DBpedia dataset it occurred that the abstracts for different
> languages contained Wikpedia markup and other strange characters. For the
> 3.2 release, we have improved DBpedia's abstract extraction code which
> results in much cleaner abstracts that can safely be displayed in user
> interfaces. 
>
>
> The new DBpedia release can be downloaded from:
>
> http://wiki.dbpedia.org/Downloads32
>
> and is also available via the DBpedia SPARQL endpoint at
>
> http://dbpedia.org/sparql
>
> and via DBpedia's Linked Data interface. Example URIs: 
>
> http://dbpedia.org/resource/Berlin
> http://dbpedia.org/page/Oliver_Stone
>
> More information about DBpedia in general is found at:
>
> http://wiki.dbpedia.org/About
>
>
> Lots of thanks to everybody who contributed to the Dbpedia 3.2 release! 
>
> Especially:
>
> 1. Georgi Kobilarov (Freie Universität Berlin) who designed and implemented
> the new infobox extraction framework. 
> 2. Anja Jentsch (Freie Universität Berlin) who contributed to implementing
> the new extraction framework and wrote the infobox to ontology class
> mappings. 
> 3. Paul Kreis (Freie Universität Berlin) who improved the datatype
> extraction code. 
> 4. Andreas Schultz (Freie Universität Berlin) for generating the Freebase to
> DBpedia RDF links.
> 5. Everybody at OpenLink Software for hosting DBpedia on a Virtuoso server
> and for providing the statistics about the new Dbpedia knowledge base.
>
> Have fun with the new DBpedia knowledge base!
>
> Cheers
>
> Chris
>
>
> --
> Prof. Dr. Christian Bizer
> Web-based Systems Group
> Freie Universität Berlin
> +49 30 838 55509
> http://www.bizer.de
> chris@bizer.de
>
>
>
>
>   
All,

A few additional items re. the new DBpedia 3.2 release:

1. Integration with OpenCyc [1] has been updated (* the owl:sameAs links 
from DBpedia now point to the latest OpenCyc URIs to identical individuals*)
2. UMBEL [2] ontology links and inference rules are in place that enable 
OpenCyc upper ontology combined with externally linked ontology (e.g. 
FOAF, SIOC, Music Ontology etc.) reasoning over DBpedia

So looking at the DBpedia data space resource: 
<http://dbpedia.org/resource/Oliver_Stone> you now have the combined 
richness of three ontologies with regards to resource type, as depicted 
below:

Yago:

    * yago:LivingPeople
    * yago:AmericanScreenwriters
    * yago:YaleUniversityAlumni
    * yago:UnitedStatesArmySoldiers
    * yago:AmericanFilmDirectors
    * yago:PeopleFromNewYorkCity
    * yago:Actor109765278
    * yago:FilmMaker110088390
    * yago:FilmDirector110088200
    * yago:Person100007846
    * yago:Screenwriter110564400

New DBpedia Ontology:

    * dbpedia-owl:Artist
    * dbpedia-owl:Actor
    * dbpedia-owl:Resource
    * dbpedia-owl:Person

UMBEL (which is OpenCyc + collection of established public shared 
ontologies also referred to as external ontologies, relative to UMBEL's 
data space):

    * umbel-sc:Actor
    * umbel-sc:Graduate
    * umbel-sc:Communicator
    * umbel-sc:Person
    * umbel-sc:Entertainer


Links:

1. http://sw.opencyc.com
2. http://umbel.org


-- 


Regards,

Kingsley Idehen	      Weblog: http://www.openlinksw.com/blog/~kidehen
President & CEO 
OpenLink Software     Web: http://www.openlinksw.com

Received on Monday, 17 November 2008 14:38:10 UTC