Re: foaf-search.net has been relaunched
Nice! We do not use a triple store any more - all important data is kept in a RDB. That's an interesting technical choice... could you tell a bit more why you did the switch? Christophe -- Onderzoeker +31(0)6 14576494 christophe.gue...@dans.knaw.nl *Data Archiving and Networked Services (DANS)* DANS bevordert duurzame toegang tot digitale onderzoeksgegevens. Kijk op www.dans.knaw.nl voor meer informatie en contactgegevens. DANS is een instituut van KNAW en NWO. *Let's build a World Wide Semantic Web!* http://worldwidesemanticweb.org/ *e-Humanities Group (KNAW)* http://ehumanities.nl/ image002.png
[CFP] 1st KNOWeSCAPE workshop on data curation and navigation @ OKCON, Sept 2013, Geneva
*(apologies for cross-posting)* = Call for papers = ** *Moving from mere open data to the creation of knowledge spaces* *COST action TD1210 “Knowescape” workshop @ OKCON, September 19th Geneva.* *http://lanyrd.com/2013/knowescape/* *http://knowescape.org/* * * *Topic* *--* *There is an increasing amount of data sets being made available online through an increasing amount of data portals. Just like the Web, this vast amount can be exploited in two ways: search and exploration. The main difference is that searching consists in finding specific data sets matching a given set of criterion while exploring relates to the opportunistic hopping from dataset to dataset following interesting links. Whereas the former can deal with isolated data silos, the later relies a lot on the presence of links across datasets and the portals. When such links are established we move from scarce data sharing to the creation of a global interconnected knowledge space that can be easily browsed for information.* *In this one day workshop we will discuss, and experiment with, the practicalities of data exploration through interconnected data source. We will also look at how the Linked Data publication principles facilitate this process. The topics of the workshop include, but are not limited to:* ** Data integration* ** Information visualisation* ** Data mining for Linked Open Data* ** Best practices for publishing and consuming Linked Data* ** Data exploration* * * *Submissions* *--* *We invite submission of 1 to 4 pages extended abstracts (LNCS format) describing a demo, an idea or a work in progress to be discussed during the event. The selected submission will be presented in a short time and discussed during the workshop. Submissions are managed via Easychair: https://www.easychair.org/conferences/?conf=knowescapewg42013* * * *Important dates* *--* ** Abstract submission deadline: August 25, 2013* ** Notifications: September 2, 2013* ** Camera ready version: September 13, 2013* ** Workshop date: September 19, 2013* * * *Invited speakers and schedule* *--* ** Invited speakers : Andreas Perret and Benjamin Zapilko* ** This is a full-day workshop (10.00-17.00). A detailed schedule will be made available on the KnowEscape website http://knowescape.org/ and the event page http://lanyrd.com/2013/knowescape/* * * *Organisation* *--* *Christophe Guéret, DANS, NL* *Peter Mutschke, GESIS, DE* -- Onderzoeker +31(0)6 14576494 christophe.gue...@dans.knaw.nl *Data Archiving and Networked Services (DANS)* DANS bevordert duurzame toegang tot digitale onderzoeksgegevens. Kijk op www.dans.knaw.nl voor meer informatie en contactgegevens. DANS is een instituut van KNAW en NWO. *e-Humanities Group (KNAW)* http://ehumanities.nl/ image002.png
[CFP] Second International Workshop on Downscaling the Semantic Web - DownScale2013
Second International Workshop on Downscaling the Semantic Web - DownScale2013http://worldwidesemanticweb.wordpress.com/downscale2013/ co-located with the 10th Extended Semantic Web conference — May 26, 2013, Montpellier, France = Objectives of the workshop = Our current mind set as Semantic Web engineers is to focus on centralized and very powerful solutions centered (and depending on …) around Web hosted servers and (mobile) clients accessing it. As a direct consequence of that, the usage of Linked Data depends on the availability of a Web infrastructure compassing data-centers, high speed reliable Internet connection and modern client devices. If any of this is missing, our community is not able, yet, to provide any Linked Data enabled data management solution. Still, the digital divide that is currently widely recognized separates the world into those who have access to Web-based platforms and those who don’t. When designing Linked Data platforms we tend to forget those 4 Billion persons who don’t have access to Internet but would benefit from being able to use Linked Data.We should keep everyone in mind when we design Linked Data platforms and aim at helping to reduce this digital divide. This workshop, organised around an morning of presentations and an hacking afternoon, as for objective to discuss the steps to take to lower the requirements for deploying Semantic Web technologies. For instance, making Semantic Web platforms usable under limited computing power and limited access to Internet. During the hacking session, a specific focus will be put on the usage of Semantic Web technology for educational software. = Topics = Topics of the workshop include, but are not limited to: * Off-line linked data synchronisation * Low resource demanding triple stores * Application of Semantic Web to disaster data management * Innovative linked data interfaces for illiterate and/or young users * De-centralised data management platforms * Collaborative, de-centralised, educational software = Program = * Morning: discussions Presentations and discussions around the need for Downscaling the Semantic Web and the challenges implied. * Afternoon: hacking session Implementation of Semantic Web enabled software using the toolkits of Sugar and SemanticXO. Deployement of these applications on limited hardware such as the XO laptop and other small hardware such as Sheevaplug. = Submissions = We welcome short papers that present down-scaled revisions of previously published systems as well as position and systems paper presenting novel ideas. Papers are expected not to exceed 6 pages and should be formatted according to the Springer’s Lecture Notes in Computer Science (LNCS) formatting guide. Submissions are managed via EasyChair: https://www.easychair.org/conferences/?conf=downscale2013 = Important dates = * Submission deadline: March 4, 2013 * Notifications: April 1, 2013 * Camera ready version: April 15, 2013 * Workshop date: May 26, 2013 = Organization committee = Christophe Guéret, Vrije Universiteit Amsterdam, Nederlands Gianluca Demartini, University of Fribourg, Switzerland Victor de Boer, Vrije Universiteit Amsterdam, Nederlands Bastien Guerry, Association OLPC France, France Jean Thiery, Association OLPC France, France = Program Committee = Anna Bon, CIS Vrije Universiteit Amsterdam, Nederlands Victor de Boer, Vrije Universiteit Amsterdam, Nederlands Philippe Cudré-Mauroux, University of Fribourg, Switzerland Maria Esther Vidal, Universidad Simón Bolívar, Venezuela Jérôme David, INRIA Grenoble – Rhône-Alpes, France Laurens Rietveld, Vrije Universiteit Amsterdam, Nederlands Mathieu D’Aquin, KMi Open University, UK Andreas Thor, University of Leipzig Wolfgang Nejdl, L3S Research Center Arjen P. de Vries, CWI, Nederlands Ivana Marenzi, L3S Research Center Elena Simperl, KIT Karlsruhe -- Onderzoeker +31(0)6 14576494 christophe.gue...@dans.knaw.nl *Data Archiving and Networked Services (DANS)* DANS bevordert duurzame toegang tot digitale onderzoeksgegevens. Kijk op www.dans.knaw.nl voor meer informatie en contactgegevens. DANS is een instituut van KNAW en NWO.
[CFP] Deadline extended! Semantic Web Journal, Special Issue on The Semantic Web for all
Dear everyone (with apologies for the cross-posting), Following the several requests we received, the deadline for the special issue on The Semantic Web for all of the Semantic Web Journal has been extended to February 28, 2013. We will however keep the original deadline of January 25 for a declaration of intentions. If you intend to submit a paper to this special issue, please send a brief email to christophe.gue...@dans.knaw.nl before the end of the week. Here are a link to the call of papers and a list of important dates. = Call for papers = http://www.semantic-web-journal.net/blog/special-issue-semantic-web-all = Important dates = Intention Submission: January 25, 2013 (please send a brief email to christophe.gue...@dans.knaw.nl) Initial Submission: February 28, 2013 (extended!) Author Notification: May 3, 2013 2nd Round Submission: June 14, 2013 Final Notification: July 5, 2013 Looking forward to your contributions, best regards, Christophe, Stephane, Mike Martin -- Onderzoeker +31(0)6 14576494 christophe.gue...@dans.knaw.nl *Data Archiving and Networked Services (DANS)* DANS bevordert duurzame toegang tot digitale onderzoeksgegevens. Kijk op www.dans.knaw.nl voor meer informatie en contactgegevens. DANS is een instituut van KNAW en NWO.
Re: CSV to RDF converter
Hi Ying, I'd like to add to the list these two softwares: * Karma: http://www.isi.edu/integration/karma/ * VIVO Harvester: http://vivo-project.github.com/ They both can import data from either CSV files or relational data bases. We used them to convert some data to RDF expressed using the VIVO ontology. Regards, Christophe On 13 December 2012 10:19, François Scharffe francois.schar...@inria.frwrote: Also in ths category you can use Datalift to do naive CSV to RDF and then SPARQL CONSTRUCT. Also provide a simple GUI to generate part of the CONSTRUCT queries. http://datalift.org/ Le 12/12/12 22:50, Martynas Jusevičius a écrit : Hey Ying, why don't you just convert CSV to raw RDF and then do the mapping, using SPARQL 1.1? Google Refine with RDF extension should be enough to do the first step: http://code.google.com/p/google-refine/ http://refine.deri.ie Martynas graphity.org On Wed, Dec 12, 2012 at 11:08 PM, Ying Ding dingy...@indiana.edu wrote: Hi, I am looking for a open source software to convert csv file to RDF based on one pre-defined ontology. Also, this converter should support complicated SQL queries (e.g., Group BY query and IF/THEN/ELSE query) while defining the mapping between csv to our pre-defined ontology. thanks ying -- Onderzoeker +31(0)6 14576494 christophe.gue...@dans.knaw.nl *Data Archiving and Networked Services (DANS)* DANS bevordert duurzame toegang tot digitale onderzoeksgegevens. Kijk op www.dans.knaw.nl voor meer informatie en contactgegevens. DANS is een instituut van KNAW en NWO.
Re: Linked Data Business Models?
Why should it not be as easy to deploy to 'The Web' Great point! A cool idea indeed! A webby application store driven by the likes of GoodRelations, FOAF Profiles, SIOC data spaces, WebID ACLs, and Payswarm is something that's missing re. poweful Linked Data showcase outside the realms of dataset publishing. Imagine if developers could produce Linked Data apps for desktops, notebooks, tables, and phones that were easy to discover, courtesy of the kind of serendipity inherent in Web-scale Linked Data meshes. Basically, you end up with something as simple as: Developer Activity: 1. write app 2. describe app -- using something as simple as a turtle document 3. deploy app to a Web location -- e.g., dropbox or an ftp location 4. ACL protect access to the app via WebID 5. use WebID watermarked X.509 certificate as the license file which enforces terms of use +1 6. announce app via a Tweet, G+, Facebook, LinkedIn post. Could we just replace that by announce to the Web as well? using a distributed social networking platform featuring the same standard goodness and openness as the rest of the Web ;-) Christophe
Re: Linked Data Business Models?
Hi all, That may or may not really fit into the discussion, but here is a small write up about the commercial benefits of doing 5 star data instead of 3: http://wp.me/p1ffiZ-7D It is not a new idea but some data owners I spoke with did not see it that way, thinking that Linked Open Data implies giving away all the data for free. This post relates what I explained to them, hope this makes sense. And if it doesn't, I'd be pleased to discuss it :-) Cheers, Christophe -- Christophe Guéret Ph.D. (c.d.m.gue...@vu.nl)http://www.few.vu.nl/~cgueret/ http://semweb4u.wordpress.com/ Postdoctoral researcher working on LATC (http://latc-project.eu) Knowledge Representation Reasoning Group Computational Intelligence Group Department of Computer Science, AI VU University Amsterdam
[CFP] 1st International Workshop on Artificial Intelligence meets the Web of Data (AImWD-2012)
Apologies for cross-posting Please, acknowledge this message to your colleagues -- CALL FOR PAPERS 1st International Workshop on Artificial Intelligence meets the Web of Data (AImWD-2012) co-located with European Conference on Artificial Intelligence (ECAI-2012) ( http://sites.google.com/site/aimwd12/ ) -- WORKSHOP DESCRIPTION -- The Linked Data initiative aims at improving data publication on the Web, thereby creating a Web of Data: an interconnected, distributed, global data space. The Web of Data enables people to share structured data on the Web as easily as they can currently share documents on the Web of Documents (WWW). The basic assumption behind the Web of Data is that the value and usefulness of data increases with the amount of interlinking with other data. The emerging Web of Data includes datasets as extensive and diverse as DBpedia, Flickr, and DBLP. A tip of the iceberg representation of its content is behind maintained at http://lodcloud.net The availability of this global data space creates new opportunities for the exploitation of Artificial Intelligence techniques in relation with knowledge representation, information extraction, information integration, and intelligent agents. Two approaches can emerge: (i) using AI techniques to address the problems the Web of Data faces or, (ii) using the design principles of the Web of Data to improve knowledge representation within AI techniques. The workshop aims at bringing together researchers and practitioners working on the Web of Data and/or Artificial Intelligence to discuss the union of these two research areas. Several core challenges, such as the interconnection of heterogeneous datasets, the provenance of the information and trust issues will be at the centre of the discussion. With this workshop, our goal is to contribute to the birth of a community having a shared interest around publishing data on the Web and exploring it using AI technologies â or the inverse, developing and improving AI technologies which use tools from the Web of Data. -- WORKSHOP CHAIRS -- + Christophe Gueret (Vrije Universiteit Amsterdam) E-mail: c.d.m.gue...@vu.nl + Dino Ienco (IRSTEA) E-mail: dino.ie...@teledetection.fr + Francois Scharffe (LIRMM) E-mail: francois.schar...@lirmm.fr + Serena Villata (INRIA Sophia Antipolis) E-mail: serena.vill...@inria.fr -- TOPICS -- We solicit original and high quality submissions addressing all aspects of this field. The topics of interest include, but are not limited to the following: * Use of machine learning algorithms for linking in the Web of Data * Inference techniques for answering questions using the Web of Data * Exploiting rich knowledge bases in the Web of Data * Intelligent agents exploiting the Web of Data * Use data mining techniques to schemas alignment in the Web of Data * Privacy and access control in the Web of Data * Licensing and provenance issues in the Web of Data * User interaction and usability issues in the Web of Data * Crawling, caching and querying the Web of Data * Web of Data search engines * Web of Data and Artificial General Intelligence * Case-Based Reasoning in the Web of Data * Natural language processing applied to the Web of Data -- INVITED SPEAKER -- We are thrilled to have Jerome Euzenat (Research Director at INRIA Lab. of Grenoble) and Philippe Cudr-Mauroux (Massachusetts Institute of Technology) as our confirmed invited speakers. -- IMPORTANT DATES -- - May 28, 2012 - Full paper submission deadline - June 28, 2012 - Notification of acceptance - July 10, 2012 - Camera-ready paper due - August 27-31, 2012 - ECAI Conference -- PAPER SUBMISSION -- The guidelines for paper submission are the following: - The paper should be written in English. - The maximum length of a paper is 12 A4-sized pages in LNCS format (format download: http://www.springer.de/comp/lncs/authors.html ). - The paper should be in PDF format. - Please submit via the online paper submission system ( https://www.easychair.org/conferences/?conf=aimwd2012 ) - A selection of papers will be published in a
[CFP] Deadline extended to March 18: Workshop on Downscaling the Semantic Web at ESWC 2012
First International Workshop on Downscaling the Semantic Web - DownScale2012 http://worldwidesemanticweb.wordpress.com/downscale2012/ May 27-28, 2012 co-located with the 9th Extended Semantic Web conference May 27-31, 2012, Heraklion, Greece = Objectives of the workshop = Our current mind set as Semantic Web engineers is to focus on centralized and very powerful solutions centred (and depending on ...) around Web hosted servers and (mobile) clients accessing it. As a direct consequence of that, the usage of Linked Data depends on the availability of a Web infrastructure compassing data-centers, high speed reliable Internet connection and modern client devices. If any of this is missing, our community is not able, yet, to provide any Linked Data enabled data management solution. Still, the digital divide that is currently widely recognized separates the world into those who have access to Web-based platforms and those who don’t. When designing Linked Data platforms we tend to forget those 4 Billion persons who don’t have access to Internet but would benefit from being able to use Linked Data.We should keep everyone in mind when we design Linked Data platforms and aim at helping to reduce this digital divide. This workshop, organised around a morning of presentations and an hacking afternoon, as for objective to discuss the steps to take to lower the requirements for deploying Semantic Web technologies. For instance, making Semantic Web platforms usable under limited computing power and limited access to Internet. During the hacking session, a specific focus will be put on the usage of Semantic Web technology for educational software. = Topics = Topics of the workshop include, but are not limited to: * Off-line linked data synchronisation * Low resource demanding triple stores * Application of Semantic Web to disaster data management * Innovative linked data interfaces for illiterate and/or young users * De-centralised data management platforms * Collaborative, de-centralised, educational software = Program = * Morning: discussions Presentations and discussions around the need for Down scaling the Semantic Web and the challenges implied. * Afternoon: hacking session Implementation of Semantic Web enabled software using the toolkits of Sugar and SemanticXO. Deployment of these applications on devices such as the XO laptop and other small hardware such as Sheevaplug. = Submissions = We welcome short papers that present down-scaled revisions of previously published systems as well as position and systems paper presenting novel ideas. Papers are expected not to exceed 8 pages and should be formatted according to the Springer’s Lecture Notes in Computer Science (LNCS) formatting guide. Submissions are managed via EasyChair: https://www.easychair.org/conferences/?conf=downscale2012 = Important dates = * Submission deadline: March 18, 2012 (extended !) * Notifications: April 1, 2012 * Camera ready version: April 15, 2012 * Workshop date: May 27 or 28, 2012 = Organization committee = Christophe Guéret, Vrije Universiteit Amsterdam, Nederlands Stefan Schlobach, Vrije Universiteit Amsterdam, Nederlands Florent Pigout, Association OLPC France = Program Committee = Victor de Boer, Vrije Universiteit Amsterdam, Nederlands Anna Bon, CIS Vrije Universiteit Amsterdam, Nederlands Stephane Boyera, Web Foundation Mathieu D’Aquin, KMi Open University, UK Louiqa Raschid, University of Maryland, USA Elena Simperl, KIT Karlshrue, Germany Andreas Thor, University of Leipzig Sameer Verma, San Francisco State University, USA Maria Esther Vidal, Universidad Simón Bolívar, Venezuela Jérôme David, INRIA Grenoble – Rhône-Alpes, France Laurens Rietveld, Vrije Universiteit Amsterdam, Nederlands Philippe Cudré-Mauroux, University of Fribourg, Switzerland
[CFP] Workshop on Down Scaling the Semantic Web at ESWC 2012
[Apologies for cross-posting] First International Workshop on Downscaling the Semantic Web - DownScale2012 http://worldwidesemanticweb.wordpress.com/downscale2012/ May 27-28, 2012 co-located with the 9th Extended Semantic Web conference May 27-31, 2012, Heraklion, Greece = Objectives of the workshop = Our current mind set as Semantic Web engineers is to focus on centralized and very powerful solutions centred (and depending on ...) around Web hosted servers and (mobile) clients accessing it. As a direct consequence of that, the usage of Linked Data depends on the availability of a Web infrastructure compassing data-centers, high speed reliable Internet connection and modern client devices. If any of this is missing, our community is not able, yet, to provide any Linked Data enabled data management solution. Still, the digital divide that is currently widely recognized separates the world into those who have access to Web-based platforms and those who don’t. When designing Linked Data platforms we tend to forget those 4 Billion persons who don’t have access to Internet but would benefit from being able to use Linked Data.We should keep everyone in mind when we design Linked Data platforms and aim at helping to reduce this digital divide. This workshop, organised around a morning of presentations and an hacking afternoon, as for objective to discuss the steps to take to lower the requirements for deploying Semantic Web technologies. For instance, making Semantic Web platforms usable under limited computing power and limited access to Internet. During the hacking session, a specific focus will be put on the usage of Semantic Web technology for educational software. = Topics = Topics of the workshop include, but are not limited to: * Off-line linked data synchronisation * Low resource demanding triple stores * Application of Semantic Web to disaster data management * Innovative linked data interfaces for illiterate and/or young users * De-centralised data management platforms * Collaborative, de-centralised, educational software = Program = * Morning: discussions Presentations and discussions around the need for Down scaling the Semantic Web and the challenges implied. * Afternoon: hacking session Implementation of Semantic Web enabled software using the toolkits of Sugar and SemanticXO. Deployment of these applications on devices such as the XO laptop and other small hardware such as Sheevaplug. = Submissions = We welcome short papers that present down-scaled revisions of previously published systems as well as position and systems paper presenting novel ideas. Papers are expected not to exceed 8 pages and should be formatted according to the Springer’s Lecture Notes in Computer Science (LNCS) formatting guide. Submissions are managed via EasyChair: https://www.easychair.org/conferences/?conf=downscale2012 = Important dates = * Submission deadline: March 4, 2012 * Notifications: April 1, 2012 * Camera ready version: April 15, 2012 * Workshop date: May 27 or 28, 2012 = Organization committee = Christophe Guéret, Vrije Universiteit Amsterdam, Nederlands Stefan Schlobach, Vrije Universiteit Amsterdam, Nederlands Florent Pigout, Association OLPC France = Program Committee = Victor de Boer, Vrije Universiteit Amsterdam, Nederlands Anna Bon, CIS Vrije Universiteit Amsterdam, Nederlands Stephane Boyera, Web Foundation Mathieu D’Aquin, KMi Open University, UK Louiqa Raschid, University of Maryland, USA Elena Simperl, KIT Karlshrue, Germany Andreas Thor, University of Leipzig Sameer Verma, San Francisco State University, USA Maria Esther Vidal, Universidad Simón Bolívar, Venezuela Jérôme David, INRIA Grenoble – Rhône-Alpes, France First International Workshop on Downscaling the Semantic Web - DownScale2012 http://worldwidesemanticweb.wordpress.com/downscale2012/ May 27-28, 2012 co-located with the 9th Extended Semantic Web conference May 27-31, 2012, Heraklion, Greece = Objectives of the workshop = Our current mind set as Semantic Web engineers is to focus on centralized and very powerful solutions centred (and depending on ...) around Web hosted servers and (mobile) clients accessing it. As a direct consequence of that, the usage of Linked Data depends on the availability of a Web infrastructure compassing data-centers, high speed reliable Internet connection and modern client devices. If any of this is missing, our community is not able, yet, to provide any Linked Data enabled data management solution. Still, the digital divide that is currently widely recognized separates the world into those who have access to Web-based platforms and those
Missing results on DBPedia end point
Hello,
There seems to be an issue with the SPARQL end point of DBPedia,
http://dbpedia.org/sparql.
When I run this first query:
SELECT ?result WHERE {http://dbpedia.org/resource/WVNS-DT2
http://dbpedia.org/resource/WVNS-DT2
http://dbpedia.org/ontology/formationDate
http://dbpedia.org/ontology/formationDate ?result. }
I get the following result telling me that ?result is a date:
sparql xmlns=http://www.w3.org/2005/sparql-results#;
xmlns:xsi=http://www.w3.org/2001/XMLSchema-instance;
xsi:schemaLocation=http://www.w3.org/2001/sw/DataAccess/rf1/result2.xsd;
head
variable name=result/
/head
results distinct=false ordered=true
result
binding name=resultliteral
datatype=http://www.w3.org/2001/XMLSchema#date;2006-09-13/literal/binding
/result
/results
/sparql
But when I want to find a resource which matches that specific date, no
result are returned:
SELECT ?result WHERE { ?result
http://dbpedia.org/ontology/formationDate
2006-09-13^^http://www.w3.org/2001/XMLSchema#date. }
gives
sparql xmlns=http://www.w3.org/2005/sparql-results#;
xmlns:xsi=http://www.w3.org/2001/XMLSchema-instance;
xsi:schemaLocation=http://www.w3.org/2001/sw/DataAccess/rf1/result2.xsd;
head
variable name=result/
/head
results distinct=false ordered=true
/results
/sparql
Could this be a bug of some sort? I also tried to run the same couple of
queries on http://lod.openlinksw.com/sparql and everything works fine there.
Cheers,
Christophe
--
Dr. Christophe Guéret (cgue...@few.vu.nl)
http://cgueret.net
Postdoc working on SOKS (http://www.few.vu.nl/soks)
Knowledge Representation Reasoning Group
Computational Intelligence Group
Department of Computer Science, AI
VU University Amsterdam
attachment: cgueret.vcf
Re: Next version of the LOD cloud diagram. Please provide input, so that your dataset is included.
Hi Ted, But please ... this time, will there be any effort to make visible the clustering within the LOD Cloud? This seems to me one of the best ways to encourage data set publishers to link out -- and that *is* important to grow the utility of the *overall* data set. To date, the only graphic I've seen which shows just how little overall interconnectedness there is (was) in the LOD Cloud is my own ... which someone has long since removed from display on the EWC wiki page with the Cloud-like graphic, and which is certainly well outdated, but which is still found here -- http://virtuoso.openlinksw.com/images/dbpedia-lod-cloud.html As for the clustering, you can also have a look at the picture we plotted with a network analysis tool: http://blog.larkc.eu/?p=1941 Our network file that we created out of the data on the ESW wiki will also be outdated as soon as the new picture is completed. I'll make a new version of it with the data on: http://www4.wiwiss.fu-berlin.de/lodcloud/ With such a file, everyone will be able to plot its own cloud picture and highlight the different structures he wants to see in it. Christophe -- Dr. Christophe Guéret (cgue...@few.vu.nl) http://cgueret.net Postdoc working on SOKS (http://www.few.vu.nl/soks) Knowledge Representation Reasoning Group Computational Intelligence Group Department of Computer Science, AI VU University Amsterdam attachment: cgueret.vcf
Re: Please stop massive crawling against http://openean.kaufkauf.net/id/
Dear Martin, I guess the VUA crawler was our. The deficient process has been stopped now and won't be restarted before being checked for bugs. Sorry about all the problems caused. Best regards, Christophe On 06/08/2010 10:03 AM, Martin Hepp (UniBW) wrote: Dear all: The volunteer who is hosting http://openean.kaufkauf.net/id/, a huge set of GoodRelations product model data, is experiencing a problematic amount of traffic from unidentified crawlers located in Ireland (DERI?), the Netherlands (VUA?), and the USA. The crawling has been so intense that he had to temporarily block all traffic to this dataset. In case you are operating any kind of Semantic Web crawlers that tried to access this dataset, please 1. check your crawler for bugs that create excessive traffic (e.g. by redundant requests), 2. identify your crawler agent properly in the HTTP header, indicating a contact person, and 3. implement some bandwidth throttling technique that limits the bandwidth consumption on a single host to a moderate amount. Note that the full dataset is always up to date in the LOD SPARQL endpoint at http://lod.openlinksw.com/sparql Thus, there is rarely a need to crawl the complete dataset. Thanks for your consideration. Best wishes Martin Hepp -- Dr. Christophe Guéret (cgue...@few.vu.nl) http://www.few.vu.nl/~cgueret/ Postdoc working on SOKS (http://www.few.vu.nl/soks) Knowledge Representation Reasoning Group Computational Intelligence Group Department of Computer Science, AI VU University Amsterdam attachment: cgueret.vcf
Re: Organization ontology
On 06/01/2010 10:26 AM, Michael Hausenblas wrote: Dave, We would like to announce the availability of an ontology for description of organizational structures including government organizations. Brilliant! I submitted it now to Sindice [1] and 'registered' the org prefix in prefix.cc [2] - you might want to support it by voting it up ;) Cheers, Michael [1] http://sindice.com/search?q=domain%3Awww.w3.org+Core+organization+ontologyq t=term [2] http://prefix.cc/org Nice. I've added it to CKAN: http://www.ckan.net/package/org_ontology Cheers, Christophe -- Dr. Christophe Guéret (cgue...@few.vu.nl) http://www.few.vu.nl/~cgueret/ Postdoc working on SOKS (http://www.few.vu.nl/soks) Knowledge Representation Reasoning Group Computational Intelligence Group Department of Computer Science, AI VU University Amsterdam attachment: cgueret.vcf
ISWC'09 2nd International workshop on Nature inspired Reasoning for the Semantic Web (NatuReS)
Apologies for multiple copies due to cross-postings. CALL FOR PAPERS The second International Workshop on Nature inspired Reasoning for the Semantic Web (NatuResS09) http://natures.few.vu.nl/2009 October 26, 2009 @ 8th international Semantic Web Conference (ISWC 2009), Washington, DC BRIEF DESCRIPTION AND OBJECTIVES The Semantic Web (SW) carries out the vision of a Web of data usable for both human and machines. This web, consisting of inter-connected instance data annotated with possibly expressive ontologies, promises a huge opportunity for Web-based applications in many domains. In this web the vision of distributed reasoning has replaced the myth of a commonly agreed upon ontology every data provider would rely on. However, existing reasoning techniques often fail to this live up to this distributed vision of knowledge on the web. Reasoner may not be able to cope with the high number of instances and/or the expressiveness of the ontologies describing them (scalability problem) or fail to deal with a sometimes unreliable network, lack of maintenance of information or the variety in quality (robustness problem). The goal of this workshop is to bring together researchers from the Semantic Web community with more Nature inspired communities, such as the people interested in Computational Intelligence (CI), Neural Networks and to discuss on current trends in Semantic Web. The workshop will feature invited talks from experts in the corresponding areas as well as contributed talks presenting submitted papers. TOPICS OF INTEREST We encourage the submission of papers investigating the use of nature inspired techniques to address knowledge representation and reasoning problems. Those problems includes (but are not restricted to) the following topics : * Data storage and retrieval: how to efficiently create and manage a repository of potentially billions of (RDF) triples. * Data integration: how to find correspondences among the different ontologies (alignments). * Complex reasoning: how to find implicit information efficiently in large, expressive, or distributed ontologies. The suggested keywords are * Neural Networks * Evolutionary computing (EA and others) * Swarm intelligence (Ants, PSO, flocking birds) * Potential field methods * Simulated annealing * Artificial immune systems * Epidemic protocols (Gossiping) * Ontology alignment * Reasoning * Distributed Knowledge Management System * Peer data management system (PDMS) * Complex systems * Data integration * Semantic Web * RDF SUBMISSIONS Submitted paper should not exceed 16 pages and must be written in English. Full papers and position papers are invited. Submissions must be formatted in the style of the Springer Publications format for Lecture Notes in Computer Science (LNCS). Full instructions are available at http://www.springer.com/computer/lncs?SGWID=0-164-2-72376-0 All papers should be submitted in electronic format (pdf version) using the following link: http://www.easychair.org/conferences/?conf=natures09 IMPORTANT DATES * Submission deadline: August 10 * Acceptance notification: August 30 * Camera ready papers: October 2 * Workshop: October 26 ORGANIZING COMMITTEE * Christophe Guéret, Vrije Universiteit, Amsterdam * Pascal Hitzler, Kno.e.sis Center, Wright State University, Dayton, OH * Stefan Schlobach, Vrije Universiteit, Amsterdam PROGRAM COMMITTEE * Özalp Babaoglu, University Bologna, Italy * Jürgen Branke, Universität Karlsruhe (TH), Karlsruhe, Germany * Bernardo Cuenca Grau, Oxford, UK * Artur Garcez, City University London, UK * Barbara Hammer, Clausthal, Germany * Frank van Harmelen, Vrije Universiteit Amsterdam, The Netherlands * Kai-Uwe Kühnberger, University of Osnabrück, Germany * Nicolas Monmarché, Polytech'Tours, France * Axel Polleres, DERI Galway, Ireland * Sebastian Rudolph, Universität Karlsruhe (TH), Karlsruhe, Germany * Christoph Schmitz, 11 Internet AG Karlsruhe, Germany * Lael Schooler, MPI Berlin, Germany * Martijn Schut, Vrije Universiteit Amsterdam, The Netherlands * Peter Tino, University of Birmingham, UK * Spyros Voulgaris, Vrije Universiteit Amsterdam, The Netherlands SPONSORS The second international workshop on Nature inspired Reasoning for the Semantic Web (NatuReS09) is sponsored by the EU funded Large Knowledge Collider LarKC. More information available on the LarKC website : http://www.larkc.eu/
