W3C home > Mailing lists > Public > semantic-web@w3.org > November 2008

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

From: Holger Stenzhorn <holger.stenzhorn@deri.org>
Date: Tue, 18 Nov 2008 14:54:08 +0100
Message-ID: <4922C900.3010300@deri.org>
To: semantic-web@w3.org

Besides the issue whether to call the DBpedia Ontology really an 
ontology, a schema or something else...
There is a small bug currently in dbpedia-ontology.owl that prevents it 
from loading correctly:
In the references to "owl:Thing" there is a space behind the "http:" - 
"http ://www.w3.org/2002/07/owl#Thing"

Cheers,
Holger

Azamat schrieb:
>
> Monday, November 17, 2008 2:11 PM, Chris Bizer wrote:
> 'We are happy to announce the release of DBpedia version 3.2. ... More
> information about the ontology is found at:
> http://wiki.dbpedia.org/Ontology' <http://wiki.dbpedia.org/Ontology%27>
>
> While opening, we see the following types of Resource, seemingly Entity or
> Thing:
>
> Resource (Person, Ethnic group, Organization, Infrastructure, Planet, 
> Work,
> Event, Means of Transportation, Anatomic structure, Olympic record,
> Language, Chemical compound, Species, Weapon, Protein, Disease, Supreme
> Court of the US, Grape, Website, Music Genre, Currency, Beverage, Place).
>
> I am of opinion to support the developers even when they misdirect. 
> But this
> 'classification' meant to be used for 'wikipedia's infobox-to-ontology
> mappings' is a complete disorder, having a chance for the URL
> http://wiki.dbpedia.org/Mess.
> Ontology is designed to put all things in their natural places, not to 
> make
> mess of the real world; if you deal with chemical compound and protein, it
> requests an arrangement like as protein < macromolecule < organic 
> compound <
> chemical compound < matter, substance < physical entity < entity. The same
> with other things, however hard, rocky and trying it may be.
>
> This test and trial proves again that any web ontology language projects,
> programming applications or semantic systems, are foredoomed without
> fundamental ontological schema.
>
> azamat abdoullaev
>
> ----- Original Message -----
> From: "Chris Bizer" <chris@bizer.de>
> To: <public-lod@w3.org>; "'Semantic Web'" <semantic-web@w3.org>;
> <dbpedia-discussion@lists.sourceforge.net>;
> <dbpedia-announcements@lists.sourceforge.net>
> Sent: Monday, November 17, 2008 2:11 PM
> Subject: ANN: DBpedia 3.2 release, including DBpedia Ontology and RDF 
> links
> to Freebase
>
>
>
> 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 Universitšt Berlin) who designed and 
> implemented
> the new infobox extraction framework.
> 2. Anja Jentsch (Freie Universitšt Berlin) who contributed to implementing
> the new extraction framework and wrote the infobox to ontology class
> mappings.
> 3. Paul Kreis (Freie Universitšt Berlin) who improved the datatype
> extraction code.
> 4. Andreas Schultz (Freie Universitšt 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 Universitšt Berlin
> +49 30 838 55509
> http://www.bizer.de
> chris@bizer.de
>
>
>
Received on Tuesday, 18 November 2008 13:54:57 UTC

This archive was generated by hypermail 2.4.0 : Tuesday, 5 July 2022 08:45:09 UTC