This is an announcement of the technical report as well as three different implementations of Semantic Pingback.

Semantic Pingback tackles the quality, timeliness and coherence as well as direct end user benefits of the emerging Linked Data Web. Semantic Pingback extends the well-known Pingback method, which is a technological cornerstone of the blogosphere.

It is based on the advertising of an RPC service for propagating typed RDF links between Data Web resources. It is downwards compatible with conventional Pingback implementations, thus allowing to connect and interlink resources on the Social Web with resources on the Data Web.

We implemented the Semantic Pingback mechanism in three different scenarios:

• A Semantic Pingback server and client plugin for OntoWiki
• A Semantic Pingback server integrated in Triplify, thus supporting the interlinking with relational data on the Data Web.
• A standalone Semantic Pingback server was implemented in PHP, that can be utilized with arbitrary resources that do not provide a Pingback service themselves.

If you do not want to provide a Pingback service on your own, you can use the AKSW Semantic Pingback Service which notifies you via email.

Die Leipzig School of Media bietet vier berufsbegleitende Masterstudiengänge auf Hochschulniveau im Medienbereich an. Darunter auch den vom Insitut für Informatik der Universität Leipzig betreuten Studiengang Content and Media Engineering, der Studenten an aktuelle IT-Entwicklungen wie z.B. semantische Technologien, E-Commerce und Wissensmanagement heranführt. Der Studiengang ist mit einmal monatlich stattfindenden geblockten Lehrveranstaltungen und einer starken Verbindung mit Praxisanwendungen optimal auf berufstätige Studierende abgestimmt.

Am 12. März 2010 sind alle Interessierten ab 15 Uhr herzlich zum Studieninformationstag eingeladen. Dieser findet in Leipzig auf dem Mediencampus (Poetenweg 28, 04155 Leipzig) statt. Neben Informationen zu den Studiengängen sowie Stipendien- und Finanzierungs­möglichkeiten können Interessierte an Lehrveranstaltungen mit renommierten Dozenten aus Wissenschaft und Praxis teilnehmen.

Die Teilnahme und das anschließende Get together mit Speisen und Getränken ist kostenfrei. Interessierte werden gebeten sich auf der Webseite der School of Media anzumelden. Die Anreise- und Übernachtungskosten werden Besuchern des Informationstags erstattet, die zum Wintersemester ein Studium an der Leipzig School of Media beginnen.

We just released version 0.8 of the Triplify script, which includes the following feature enhancements and fixes:

• Triplify now supports the Semantic Pingback mechanism: It exposes a X-Pingback HTTP header field, it contains a XML-RPC service (also usable by conventional Pingback clients) and it exports Pingback statements along with the instance data.
• Fix: The cache ID is now generated using the server name, port and request URI.
• Fix: We added a 404 Resource not Found error message.
• Fix: We added a config option to disable the use of mod_rewrite (for cases, where the module is available, but not configured).
• Fix: Removed hard-coded MySQL settings to allow e.g. PostgreSQL servers (#2899948)
• Fix: Duplicate triples in some cases (#2833620)
• Fix: 404 when URI with query was requested (e.g. json output, #2631600)

The new features are documented on triplify.org.

Thanks to everybody contributing bug fixes or comments and code (especially Eric Feliksik).

Today, we released a major update of the DL-Learner plugin for Protege 4, the popular ontology editor. The plugin allows you to get suggestions for axioms you may want to add to your OWL ontology by analysing the instance data using the DL-Learner framework. A screencast is available to show you how it works. The plugin is installable via the standard Protégé plugin mechanism (Protege 4 stable release required). This version allows to fine tune the language features you want to use and displays the length of expressions, which have been searched. It also fixes bugs related to inconsistency handling. More information can be found on the plugin wiki page. Enjoy!

After the great success of the first Leipziger Semantic Web Tag (LSWT) in 2009 AKSW is organizing another installment of this event on 6th May. In addition to demonstrating the benefits of semantic technologies to enterprises, this year’s LSWT focuses on Open Data in science and E-government. A particular highlight will be the festive announcement of the German chapter of the Open Knowledge Foundation. More information on the LSWT can be found (in German) at: http://aksw.org/Events/2010/LeipzigerSemanticWebDay.