May 4-5: Leipziger Semantic Web Tag 2011 and Local Media Conferenz

Like in the past two years, we again organize a Leipzig Semantic Web Day on May 5th at the marvelous Mediencampus Villa Ida. This year’s theme is “Linked Data  for the Masses”, particularly focusing on its use in enterprises. This event will not only give you the opportunity to discuss current developments around semantic web technologies, but also to get in touch with companies from the German-speaking world. LSWT2011 will have two distinguished keynote speakers: Martin Hepp will share his vision and recent developments around the GoodRelations ecommerce vocabulary with us. The second keynoter Andreas Blumauer from the Semantic Web Company in Vienna will show us how Linked Data can facilitate clean energy.

On the pre-conference day May 4th we will have two tutorials  – an introduction to the Semantic Data Web and another one on the GoodRelations ecommerce vocabulary. Also, on May 4th SoLoMo the Local Media Conference takes place at the Mediencampus, discussing developments around Groupon, Foursquare, Qype, MyHeimat and other local-oriented media.

You can find more information about LSWT at: http://aksw.org/LSWT.

We thank the following LSWT sponsors for their support:




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AKSW adventures to Sächsische Schweiz !!

On the 3rd of April 2011, a beautiful sunny day in Saxony, the AKSW members decided to visit the beautiful Sächsische Schweiz along with their respective children and spouses ! In all, we were 14 adults plus 7 kids, out of which 3 were in prams (Strollers or Kinderwagons). We decided to explore the peak “Rauensteine”, which (from reviews) seemed to be the best option for us since it was ‘recommended’ to be a suitable trek for children ! Besides, it was only 6km long and offered multiple spots where we could catch a panoramic view of the breathtaking scenery around us.

At 7:30am, a few of us gathered at the Leipzig Hbf and bought the Sachsen-Ticket, which is reasonably priced and allows five people to travel in one ticket by the Regional Express. A few others joined at Engelsdorf, while the rest joined us directly at Dresden Hbf. From Dresden Hbf, we hurried to catch our next train, the S-Bahn, which would take us to Stadt Wehlen, where we would start treking from. At 10:31, our train reached Stadt Wehlen and thats where the adventure began!

The beginning of the route was a steep and rocky surface which made it difficult for the prams to be dragged along. However, we slowly made our way up while the kids in the pram enjoyed the “bumpy” ride ;-). The sunny weather did add to the adventure but it was more than welcome after a very cold winter. Within an hour we reached our first picnic spot – a rocky plateau in front of the first staircase. We were rewarded for our hard-work by a beautiful view of not only the Bastei on one side but also the fortress Königstein on the other. Everyone rested for a while, shared some snacks and some of us even lay down in the shade for a bit.

And we sure did need that bit of rest because the next part of our trek was even more challenging ! We not only had to make ourselves through the most narrowest of crevices and wobbly staircases, but also had to carry the prams along, which therefore had to be actually picked up rather than being dragged along. Since it was wise not to keep the babies in the pram, two of the babies, Nika and Sophia, found themselves sitting on the shoulders of one of their parent while the youngest, Mathilda, was strapped up with her mother. Two of the prams were even dismantled so that it would be easier to carried by one person.

Slowly but steadily the parents, the children, the prams (carried by two people) and the rest of us made ourselves up and down the dangerously constructed staircases, the small pathways through two boulders of rocks and sometimes along man-made bridges to pass along, what would be a very high fall ! The adventure ended as we reached a restaurant called “Bergrestaurant Fels Rauenstein”, where all of us enjoyed the comfort of the shade and some awesome ice-cream and pancakes. The rest of the trek seemed to be easier as we were mainly descending and the surface seemed to be rather smooth. We made a final stop at a vast green meadow which faced the Bastei, for a quick food, water and rest break. Thereafter, we slowly made our way down to the train stop. Since we had some time before the train would arrive, we went to the River Elbe where some of us, including the kids, dipped our feet into the extremely cold water !

The journey back home was fun but not as adventurous of course and most of us were tired. But, while only some of us agree it was a difficult trek, we all think it was a great adventure and totally worth visiting – but maybe not with prams ;-).

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JWS Most Cited Article 2006-2010 Award for DBpedia paper

Together with the FU Berlin members of the DBpedia team Sebastian, Jens and Sören won the Journal of Web Semantics Most Cited Article 2006-2010 Award for the paper: DBpedia – A Crystallization Point for the Web of Data. The paper appeared in the special issue “The Web of Data” in Volume 7, Issue 3 of the Journal of Web Semantics (JWS) Elsevier in 2009. Since its publishing, DBpedia became a hub on the Web of Data and a crucial resource for many research approaches. From that perspective, its not surprising that the paper gets cited a lot, although much has changed meanwhile in DBpedia: there is now the DBpedia ontology, we have a collaborative mapping system in place for aligning the DBpedia data with this ontology. There are a number of internationalization efforts and DBpedia Live, which provides real-time updates is slowly maturing.

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AKSW Conference participation this spring: ESWC, ICWE, WIMS

Members of AKSW are actively participating in some key (Semantic) Web conferences this spring.

AKSW was already involved in the organization of 8th Extended Semantic Web Conference 2011 with Jens being one of the PC Chairs of the Linked Data track and a number of other AKSW researchers serving as members of the PC of various tracks, workshops and side events. Now also three AKSW submissions were accepted for the main conference programm (having a 23% acceptance rate) at ESWC:

For 11th International Conference on Web Engineering (ICWE 2011), Sören serves as chair of the programme committee and Axel is one of the Demo & Poster Chairs.

Sören is also giving a key-note on “Creating Knowledge Out of Interlinked Data” at the International Conference on Web Intelligence, Mining and Semantics (WIMS’11). WIMS takes place from May 25th-27th in Sogndal, Norway.

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AKSW and LOD2 at the Reasoning Web Summer School 2011

This years Reasoning Web Summer School is organized by LOD2 partner DERI and will take place in the last week of August (August 23-27) in Galway, Ireland. LOD2 is involved in this years edition of the renowned summer school with a lecture by Sören giving an introduction and overview on Linked Data approaches. Prospective students interested to attend the summer school can apply till April 30th. The programme of the school will include a poster session where students can present and discuss their ongoing research with lecturers and colleagues. Applications shall include a remark on whether a poster will be presented along with a short abstract.

All information about the Reasoning Web summer school 2011 can be found at: http://reasoningweb.org/2011

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Philipp Cimiano and colleagues visit AKSW

On Jan 21st, Philipp Cimiano, Christina Unger and John McCrae from the Semantic Computing Group at CITEC at the University of Bielefeld visited AKSW. After each one briefly introduced themselves, Sören gave an overview of the activities and projects that AKSW is currently involved in focusing on the current projects that would be of interest to the visitors. Thereafter, John gave a detailed presentation about the MONNET project, in which a lexical model for ontologies is developed, which provides multilingual ontology localization, cross-lingual ontology-based information extraction and multi-lingual knowledge access and visualization. This was followed by an discussion of possible integration of MONNET with OntoWiki. In particular, OntoWiki could be used as an editor for so called lemon models, which are used in MONNET. Next, Sebastian Hellmann presented his vision of the NLP2RDF framework, which integrates multiple NLP tools and linguistic ontologies in order to explicate implicit meaning of natural language by means of RDF/OWL descriptions. He also shared ideas on building a linguistic LOD cloud. Post lunch, we split up into a smaller group to discuss about specific projects within both groups. Christina gave a presentation on the question answering system Pythia that uses lemon for linguistic parsing. Thereafter, John demonstrated the lemon system, Saeedeh and Sören showed the LOD Query system (currently work in progress) and Jens demonstrated the AutoSPARQL prototype.  Moreover, experimental settings for the “1st Challenge on Question Answering over Linked Data” were discussed. The meeting ended with exchange of interesting ideas discussions about potential collaborations between the two groups. Some individual meetings between group meetings were scheduled, in particular related to question answering systems and NLP models, where we hope to push the state of the art by combining knowledge and experience from both groups.

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Andraz Tori from Zemanta visits AKSW

On 13th January, Andraz Tori visited Leipzig to speak to the AKSW group about Zemanta. He first briefed us about the history of Zemanta and it’s developers, who built an API that displays relevant tags, links and pictures from unstructured data/content. He not only discussed, in detail, the architecture but also the workflow behind Zemanta. He showed the online demo by using one of the AKSW blog posts, which did display relevant tags from Wikipedia, Google Maps, Twitter and YouTube as well as links to related articles. The meeting ended with an interesting conversation of the possible enhancements and integration of technologies between Andraz and the experts at AKSW. For example, users may be given the option to agree or disagree with the suggestions thus enriching blog posts with semantic search and thereby bringing more meaningful data to the forefront. We thank Andraz for visitng us and more importantly, we are happy that Zemanta will be working closely with the LOD2 project.

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OntoWiki Mobile – knowledge management in your pocket

The AKSW research group is pleased to announce the first prototype of OntoWiki Mobile, which allows users to collect instance data and refine structured knowledge bases on-the-go. The development of OntoWiki Mobile was triggered by users aiming to gather data in field conditions (e.g. bio-diversity surveys). It allows accessing OntoWiki on a mobile device, even without persistent data connection and limited electric power supply.

OntoWiki Mobile is a mobile semantic collaboration platform based on the OntoWiki framework. It is implemented as an HTML5 web application and completely mobile device platform independent. The mobile UI was built using HTML5 and jQuery Mobile specially for mobile devices. It allows simple navigation through interlinked resources in OntoWiki knowledge bases.
OntoWiki Mobile allows offline access to selected knowledge bases with the ability to author data offline and synchronize it later once the data connection becomes available again.
An faceted browsing mode optimized for the mobile use enables OntoWiki Mobile users to quickly retrieve information on the go. Resource editing in OntoWiki Mobile is done using RDFauthor. The system makes use of RDFa-annotations in web views in order to make the RDF model data available on the client.

More details can be found at the project page.

Latest revision is always available as a demo.

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Media reports about the university history knowledge base "Catalogus Professorum"

The Catalogus Professorum is a project by historians and AKSW research group from Universität Leipzig to enlighten the academic history in Germany by representing information about professors, their professional, familiar and societal context in a comprehensive, semantically structured knowledge base. It currently features more than 1500 detailed biographies of academics with some ties to Universität Leipzig, but due to the mobility of the academic community it gives also insights on the academic life in Germany and central Europe in general. The knowledge base allows historians to pursue various research questions by employing the Catalogus Professorum knowledge base. Of particular interest are currently the relationship between religious movements, political systems, family ties and academia. However, since the information is represented semantically independent of a particular usage scenario it can be easily used to facilitate the investigation of novel research questions. We believe, that the Catalogus Professorum can contribute to triggering a paradigm shift in historian research towards more collaborative work and easier reuse of previous results.

Catalogus Professorum is based on OntoWiki, the Semantic Data Wiki developed by AKSW research group. In addition, to a simplified Web interface for accessing the knowledge base by the general public, OntoWiki offers access to domain experts and knowledge engineers to the knowledge base in a comprehensive semantic collaboration platform.

Currently, the historical online database about professors of the University of Leipzig – Catalogus Professorum Lipsienses – has been featured in the media. First it was discussed in a feature by Leipzig’s university radio station Mephisto 97,6 and also the leading local daily newspaper Leipziger Volkszeitung wrote about the catalog last week.

LVZ article on the Professors Catalogue

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Navigational Knowledge Engineering (NKE) and HANNE

Over the last year, we have worked on a methodology called Navigational Knowledge Engineering – in short NKE.

We have amounted a good deal of documents, a web demo (HANNE) , source code and images, which we publish and link to on this page:http://aksw.org/Projects/NKE

Summary:
NKE is a light-weight methodology for low-cost knowledge engineering by a massive user base. Although structured data is becoming widely available, no other methodology – to the best of our knowledge – is currently able to scale up and provide light-weight knowledge engineering for a massive user base. Using NKE, data providers can publish flat data on the Web without extensively engineering structure upfront, but rather observe how structure is created on the fly by interested users, who navigate the knowledge base and at the same time also benefit from using it. The vision of NKE is to produce ontologies as a result of users navigating through a system. This way, NKE reduces the costs for creating expressive knowledge by disguising it as navigation.

We would also like to steer your attention to the Web Demo at http://hanne.aksw.org, the Tutorial slides for the Web demo and two mockups, which visualize how the methodology could be integrated into Wikipedia and Amazon.com .

As we believe that the methodology is quite novel (please tell us in case you know something similar), we are still discussing all possible applications and implications. In particular, we are searching for suggestions, where to integrate and test our methodology next. Please feel free to contact us.

Special thanks to Markus Strohmaier (TU Graz)

Sebastian Hellmann, Jens Lehmann, Jörg Unbehauen and Claus Stadler

Links:
Main Page: http://aksw.org/Projects/NKE
Web demo: http://hanne.aksw.org
Tutorial slides: http://svn.aksw.org/papers/2011/WWW_NKE/hanne_tutorial/hanne_tutorial_public.pdf
Mockups: http://aksw.org/Projects/NKE#Mockups

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