AKSW Blog

New AKSW Layout

Posted on May 18, 2007 by Sebastian Tramp

Thanks to Michael Haschke – he has provided a new layout both for our wiki @ aksw.org and our blog here. In his diploma thesis he will upgrade OntoWiki for use-cases in the personal knowledge management area. I hope, he will also find time to burnish our OntoWiki GUI 😉 .

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DBpedia Relationship Finder released

Posted on May 3, 2007 by Jens Lehmann

Release of the DBpedia Relationship Finder. The relationship finder explores the DBpedia dataset two find out which relations exist between two things. It can answer questions like “How are Leipzig and the Semantic Web related?“.

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OntoWiki 0.6 released

Posted on April 29, 2007 by Sebastian Tramp

We’ve released the version 0.6 of our distributed knowledge engineering tool OntoWiki. We re-engineered most part of it to support a more flexible architecture with themes and plugins. OntoWiki is based now on the Zend Framework and requires PHP 5.2 (because of the new __toString() behavior).

This is the first stand-alone version of OntoWiki. It still includes Powl but we decided to release both tools separately to provide a more user-friendly installation and setup process.

Changes in this release includes a themeable interface, a guided installation, basic access control at model scope and some bugfixes in the class tree, the map tab and the auto suggestion feature.

Posted in OntoWiki, Software Releases | 3 Comments

New database-driven SPARQL engine for RAP

Posted on April 29, 2007 by Sebastian Tramp

Today our diploma student Christian Weiske finished the last bits of his RAP based database-driven SPARQL engine which implements most parts of the W3C recommendation now. Compared to the current memory-based SPARQL engine in RAP, SparqlEngineDb generates SQL queries to load off the hard work to the database engine. This speeds up SPARQL queries greatly, allowing operation on millions of RDF statements with ease, and without worrying about PHP memory consumption.

A new version of RAP including the new engine will be released shortly. In the meantime, Powl and OntoWiki internals will be switched to use SPARQL queries making it possible to use different data backends.

Posted in OntoWiki, Powl, Software Releases | 1 Comment

DBpedia Hack Night in Copenhagen

Posted on April 24, 2007 by Sören Auer

Via Binary Relations Blog: If you are in the general vicinity of Copenhagen on the evening of the 24th of April (yep, that’s tomorrow), and remotely interested in RDF, SPARQL or DBpedia, stop by ITU, where we’ll be hacking away from 20:00.

If you read Danish, see the original announcement by Claus Dahl in the kitchen: DBPedia hack-aften?

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Collaborative Knowledge Construction – The Challenge

Posted on April 13, 2007 by Sebastian Tramp

Next week starts the Knowledge Construction Challenge from the CKC2007, a Workshop on Social and Collaborative Construction of Structured Knowledge which is arranged in conjunction with the 16th International World Wide Web Conference (WWW2007) in Banff, Canada.

The goal of the CKC challenge is to use the current state of the art for the tools as a jumping off point to collect and discuss requirements for such tools; features that users need; features that they like or dislike.

OntoWiki is one of the participating tools and we invite you to participate in the challenge.

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dbpedia is catching on

Posted on April 3, 2007 by Sören Auer

The dbpedia project started by AKSW (together with Chris Bizer from FU Berlin and OpenLink Software) is getting increasingly popular. No wonder, since the over 10 Mio. RDF triples extracted from the English Wikipedia allow the astonishing answering of previously hard-to-answer questions. Who for example knows what connects Leipzig with Innsbruck?

Interesting articles about dbpedia:
Did You Blink? The Structured Web Just Arrived – Michael K. Bergman (AIÂ³)
Different Approaches to the Semantic Web – Tim O’Reilly (O’Reilly Media)
Integrating Wikipedia and SW – Ivan Herman (W3C)
Querying Wikipedia like a Database – Mike Linksvayer (Creative Commons)
Interview with Sören Auer (Semantic Web School)

Posted in Announcements, dbpedia | 1 Comment

Conf. on Social Semantic Web

Posted on March 20, 2007 by Sören Auer

The AKSW workgroup co-hosts the conference on Social Semantic Web, September 26-28th in Leipzig, Germany. The well known entrepreneur and innovator Kingsley Idehen will give an invited talk on “Hello Data Web – Exposing the Data Web”. Submission deadline for CSSW is June 1st, so still much time to prepare a submission. All details are to be found at http://aksw.org

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OntoWiki / Powl 0.95 released

Posted on March 13, 2007 by Sebastian Tramp

We’ve released Version 0.95 of our OntoWiki / Powl Semantic Web application suite. New features include an OntoWiki Command Line Interface (owcli), which is a PHP command line script for administration and remote control of OntoWiki models. Other changes are:

system ontology translation updates (nl)
code and gui cleanups (OntoWiki)
installation improvements
further steps towards MSIE compatibility
shipping with newest RAP version
some bugfixes (Powl API, OntoWiki)

You can download this release at SourceFourge

BTW: pOWL is now written Powl to avoid questions on how to pronounce the name 🙂

Posted in OntoWiki, Powl, Software Releases | 2 Comments

Query browser for Wikipedia extraction

Posted on March 8, 2007 by Sören Auer

The query browser and builder interface for our Wikipedia extraction is (re-)launched. You can build your own queries on the semantic database containing over 10 million facts extracted from the English Wikipedia at: http://wikipedia.aksw.org.