DBpedia

DBpedia Faceted Browser and DBpedia User Script released

ChristianBecker — Tue, 22 Sep 2009 13:04:19 +0000

We are pleased to announce the release of the DBpedia Faceted Browser by Jona Christopher Sahnwaldt as well as the DBpedia User Script by Anja Jentzsch.

The DBpedia Faceted Browser allows you to explore Wikipedia via a faceted browsing interface. It supports keyword queries and offers relevant facets to narrow down search results, based on the DBpedia Ontology. In this manner, queries such as “recent films about Buenos Aires” can be easily and intuitively posed against DBpedia.
The DBpedia Faceted browser was developed in cooperation with the search engine company Neofonie, which also kindly provided the funding for this project.

The DBpedia User Script is a Greasemonkey script that enhances Wikipedia pages with a link to their corresponding DBpedia page and can be used within Firefox, Safari and Opera with a suitable Greasemonkey plugin.

Links:

DBpedia 3.3 released

Georgi Kobilarov — Fri, 03 Jul 2009 10:59:28 +0000

We are pleased to announce the release of DBpedia 3.3. This release is based on Wikipedia dumps of May 2009.

The new release includes the following improvements over DBpedia 3.2:

1. more accurate abstract extraction
2. labels and abstracts in 80 languages
3. several infobox extraction bugfixes
4. new links to Dailymed, Diseasome, Drugbank, Sider, TCM
5. updated Open Cyc links

You can find the datasets here, and the rdf files here. The dataset is available to be queried at our Sparql endpoint.

After eight long months without DBpedia release (due to a lack of Wikipedia dumps), today’s release will bring us up to speed again, and we will release DBpedia datasets much more often in the future.

3sat TV magazine features Linked Data and DBpedia

ChrisBizer — Sat, 27 Jun 2009 07:43:52 +0000

The 3Sat computer magazine ‘neues‘ has broadcasted a feature about Linked Data and DBpedia and the roles both efforts are playing in the evolution of the Web into a medium for the publication and linkage of data.

See:

Komplett verlinkt (Description of the broadcast, German)
Broadcast, 3Sat, 21.6.2009 (German)

Background information:

DBpedia – A Crystallization Point for the Web of Data. To appear in: Journal of Web Semantics (JWS), Special Issue on the Web of Data.
Linked Data - The Story So Far. To appear in: Journal on Semantic Web and Information Systems (IJSWIS), Special Issue on Linked Data.

DBpedia at the MediaWiki Developer Meet-Up (April 3.-5. in Berlin)

ChrisBizer — Thu, 02 Apr 2009 13:59:02 +0000

Chris Bizer and Christian Becker will be at the MediaWiki Developer Meet-Up in Berlin this week-end.

So if you are also there and you are interested in DBpedia, just grap us.

If we manage to get hold of the beamer and people are interested, we might also present the following slides

http://www4.wiwiss.fu-berlin.de/bizer/pub/WikiMediaDevMeeting-DBpedia-Talk.pdf

See you at C-Base,

Chris

DBpedia now part of Amazon Public Data Sets

Sören — Fri, 27 Feb 2009 18:41:28 +0000

Kingsley announced on Tuesday that the first of data sets from the LOD community including DBpedia have been uploaded to the Amazon’s public data set hosting facility. Thus you can now do the following:

Download DBpedia data from Amazon’s hosting facility at no cost to your own data center and then build your own personal or service specific edition of DBpedia
Download to an EC2 AMI and build yourself using Virtuoso or any other Quad / Triple Store
Use the DBpedia EC2 AMI which we provide (which will produce a rendition in 1.5 hrs)

We especially thank our colleagues and new Linked Data supporters at both Amazon Web Services and Infochimps.org for their assistance re. getting this very taxing process in motion.

DBpedia version 3.2 released including the new DBpedia Ontology

ChrisBizer — Mon, 17 Nov 2008 12:54:36 +0000

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 template properties are mapped to 940 ontology properties), and not having clearly defined datatypes for properties. Therefore, the instance data within the infobox ontology is much cleaner and better structured than the infobox data within the DBpedia infobox dataset which 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.

Access the new DBpedia knowledge base

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

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!

DBpedia is now interlinked with Freebase. Links to OpenCyc updated.

ChrisBizer — Sat, 15 Nov 2008 10:32:14 +0000

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 (See release note). 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 instance, you can use the Marbles Linked Data browser to view data about the Lord of the Rings from Freebase and DBpedia smushed together.

We have also updated the the RDF links to OpenCyc, which allow you to use DBpedia instance data together with conceptual knowledge of OpenCyc.

Example Freebase Link

http://dbpedia.org/resource/Woody_Allen owl:sameAs http://rdf.freebase.com/ns/guid.9202a8c04000641f800000000004064f

Example Open Cyc Link

http://dbpedia.org/resource/Tetris owl:sameAs http://sw.opencyc.org/2008/06/10/concept/Mx4rv9-ZUpwpEbGdrcN5Y29ycA

The links are available via the DBpedia Linked Data interface and via SPARQL endpoint and can also be downloaded as single files:

DBpedia Mobile won the 2nd prize of the Semantic Web Challenge 2008

ChrisBizer — Sun, 02 Nov 2008 12:49:23 +0000

We are happy to announce that DBpedia Mobile has won the 2nd prize of the Semantic Web Challenge at the 7th International Semantic Web Conference.

DBpedia Mobile is a location-aware client for the Semantic Web that can be used on an iPhone and other mobile devices. Based on the current GPS position of a mobile device, DBpedia Mobile renders a map indicating nearby locations from the DBpedia dataset. Starting from this map, the user can explore background information about his surroundings by navigating along data links into otherWeb data sources. DBpedia Mobile has been designed for the use case of a tourist exploring a city. As the application is not restricted to a xed set of data sources but can retrieve and display data from arbitrary Web data sources, DBpedia Mobile can also be employed within other use cases, including ones unforeseen by its developers. Besides accessing Web data, DBpedia Mobile also enables users to publish their current location, pictures and reviews to the Semantic Web so that they can be used by other Semantic Web applications. Instead of simply being tagged with geographical coordinates, published content is interlinked with a nearby DBpedia resource and thus contributes to the overall richness of the Geospatial Semantic Web.

For more information about DBpedia Mobile please refer to:

DBpedia 3.1 breaks 100 million triples barrier

JensLehmann — Mon, 18 Aug 2008 07:58:47 +0000

Today, we released DBpedia 3.1. As always in the past years, the size of Wikipedia increased a lot over the past months. The new extraction contains 116,7 million triples, marking an increase of 27% over the previous version.

Apart from the more recent Wikipedia dumps we used, some notable improvements are a much better YAGO mapping, providing a more complete (more classes assigned to instances) and accurate (95% accuracy) class hierarchy for DBpedia. The Geo extractor code has been improved and is now run for all 14 languages. URI validation has switched to the PEAR validation class.

Downloads | ChangeLog

DBpedia Mobile released.

ChrisBizer — Sun, 11 May 2008 09:53:04 +0000

Freie Universität Berlin has released DBpedia Mobile. Based on the current GPS position of a mobile device, DBpedia Mobile renders a map containing information about nearby locations from the DBpedia dataset (currently around 300,000 locations). DBpedia Mobile uses the Marbles Linked Data Browser to render Fresnel-based views for selected resources, as well as its SPARQL capabilities to build the map view. Starting from the map, users can explore background information about locations and can navigate into DBpedia and other interlinked datasets such as GeoNames, Revyu, EuroStat and Flickr.

More information about DBpedia Mobile is found on the project website.