Re: [Dbpedia-discussion] ANN: DBpedia 3.2 release, including DBpedia Ontology and RDF links to Freebase

John Muth wrote:
> Congrats all, and big thanks for your continuing great work.
>
> The YAGO Classes and YAGO Links links are not working for me just now -- are
> the URLs wrong or are the files yet to be published?
>
> http://downloads.dbpedia.org/3.2/links/yago_en.nt.bz2
> http://downloads.dbpedia.org/3.2/links/yagolink_en.nt.bz2
>
> Thanks again,
> John Muth
>   

John,

Hmm..

Will have look and get it sorted if it's actually missing.

Kingsley
> On 17/11/08 12:11, "Chris Bizer" <chris@bizer.de> 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
>>
>>
>>
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-- 


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 16:48:22 UTC