Re: Pushing back into Wikipedia? Re: ANN: DBpedia 3.2 release, including DBpedia Ontology and RDF links to Freebase
Tim Berners-Lee wrote: Now that there has been so much clean-up work which has been done, has there been any discussion of pushing back the cleanliness into the wikipedia pages themselves, so that the wikipedia gains in consistency? Yes, we are thinking about this quite a while. The first step will be to set up some kind of live-syncronization between Wikipedia and DBpedia. For this we already got access to the live-stream of Wikipedia updates from Wikimedia's Brion Vibber. As a second step the DBpedia additions will be integrated back as annotations into Wikipedia pages. As a result there would be some kind of roundtrip-engineering between bot possible: If people see a error or mistake they can correct in Wikipedia and the correction will show up on DBpedia. However, we have to be careful not to overstrain Wikipedians, since they are usually more interested in texts than structure ;-) Best, Sören
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 [EMAIL PROTECTED] 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:Person17846 * 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 *
AW: ANN: DBpedia 3.2 release, including DBpedia Ontology and RDF links to Freebase
Hi Andreas, we for sure want to do this, but also did not want to postpone the DBpedia 3.2 release any further. So be ensured that the upcoming public user interface for defining the infobox-to-ontology mappings will include the possibility to reuse existing classes and properties and that external classes and properties will be used within the 3.3 release. Defining the infobox-to-ontology mappings that we currently have was already a lot of work (Anja thanks again), so please be patient with the mappings/reuse of external ontologies. Cheers Chris -Ursprüngliche Nachricht- Von: Andreas Harth [mailto:[EMAIL PROTECTED] Gesendet: Montag, 17. November 2008 16:55 An: Chris Bizer Cc: public-lod@w3.org; 'Semantic Web'; dbpedia- [EMAIL PROTECTED]; dbpedia- [EMAIL PROTECTED] Betreff: Re: ANN: DBpedia 3.2 release, including DBpedia Ontology and RDF links to Freebase Hi Chris, Chris Bizer wrote: 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 great work! One thing: what's the reason for creating your own classes rather than re-using or sub-classing existing ones (foaf:Person, geonames:Feature...)? Same for properties (foaf:name, dc:date...). Regards, Andreas. -- http://swse.deri.org/
Re: [Dbpedia-announcements] ANN: DBpedia 3.2 release, including DBpedia Ontology and RDF links to Freebase
Chris Bizer wrote: Hi Andreas, we for sure want to do this, but also did not want to postpone the DBpedia 3.2 release any further. So be ensured that the upcoming public user interface for defining the infobox-to-ontology mappings will include the possibility to reuse existing classes and properties and that external classes and properties will be used within the 3.3 release. Defining the infobox-to-ontology mappings that we currently have was already a lot of work (Anja thanks again), so please be patient with the mappings/reuse of external ontologies. Cheers Chris Andreas, Apropos Chris' comments above, it's coming. DBpedia ontology to UMBEL ontology mapping is one of a number of mappings that will emerge in due course. That said -- by the very nature of this project and RDF based Linked Data in general -- anyone with a vested interest in the ontology mapping efforts can step in and accelerate matters. Thus, I encourage others to participate bearing in mind DBpedia 3.2's increased compatibility with such endeavors. Kingsley -Ursprüngliche Nachricht- Von: Andreas Harth [mailto:[EMAIL PROTECTED] Gesendet: Montag, 17. November 2008 16:55 An: Chris Bizer Cc: public-lod@w3.org; 'Semantic Web'; dbpedia- [EMAIL PROTECTED]; dbpedia- [EMAIL PROTECTED] Betreff: Re: ANN: DBpedia 3.2 release, including DBpedia Ontology and RDF links to Freebase Hi Chris, Chris Bizer wrote: 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 great work! One thing: what's the reason for creating your own classes rather than re-using or sub-classing existing ones (foaf:Person, geonames:Feature...)? Same for properties (foaf:name, dc:date...). Regards, Andreas. -- http://swse.deri.org/ - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Dbpedia-announcements mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/dbpedia-announcements -- Regards, Kingsley Idehen Weblog: http://www.openlinksw.com/blog/~kidehen President CEO OpenLink Software Web: http://www.openlinksw.com
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 [EMAIL PROTECTED] 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 [EMAIL PROTECTED] - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Dbpedia-discussion mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/dbpedia-discussion http://www.bbc.co.uk/ This e-mail (and any attachments) is confidential and may contain personal views which are not the views of the BBC unless specifically stated. If you have received it in error, please delete it from your system. Do not use, copy or disclose
