News and Updates on the KRR Group
Header image

We are glad to announce that the LarKC Platform Release v1.1 is now available in our repository on

The redistributable package can be downloaded from our collaborative development environment, LarKC@SourceForge at: (OS independent)

The source code belonging to the release can be checked out from SVN at:

The complete (updated) manual for both users and developers can be found at:

If you need any support or want to give us any feedback, don’t hesitate to contact us at:

  • (if you want to use LarKC)
  • (if you are or are willing to become a LarKC developer)

If you are interested in discussions around the LarKC Platform, don’t hesitate to participate in our forums at:

We hope you enjoy LarKC and we are looking forward to your feedback!

The LarKC Platform development team

Prof. Dr. Fensel received an award for the excellent project coordination of LarKC at the event “Austrian Champions in European Research” from the Austrian Research Promotion Agency (FFG).

(By Jose Quesada)Twitter plans to support annotations. Since Facebook started supporting RDFa with their openSocial graph, it was just a matter of time that twitter followed. What are annotations? From Gigaom:

In a nutshell, Annotations would allow developers (and Twitter itself, of course) to add additional information to a tweet — such as a string of text, a URL, a location tag or bits of data — without affecting its character count. In other words, such information would be metadata about the tweet or the user who posted it, and would be carried along as an additional payload as it traveled through the Twitter network. Apps and services could then collect that information and filter it or make sense of it.

It isn’t clear exactly how Annotations will be implemented, but it doesn’t matter, as they are published in some form. This is a gigantic nod towards linked data by one of the largest internet companies (others, such as Google and Facebook both already support RDFa).In some ways, Annotations are like Facebook’s open graph protocol, which also adds metadata to the behavior of users. But they could also be Activity Streams, an extension to the Atom format to represent social objects (see slide 6).There seems to be a lot of interest on real-time web combined with linked data. Alex Passant won the scripting challenge at ESWC2010 with sparqlPuSH, which uses XMPP. And of course there’s C-SPARQL.What this means is that now the three largest social web companies (Google, Twitter, Facebook) all will support linked data formats. It is hard to overestimate this fact. As Bernard Lunn (excellent coverage) puts it:

When gorillas compete, everybody else wins. The logic of the market is increasing support for RDFa by Google, Facebook, Twitter and therefore everybody else.

That is a win for open standards and that is a win for all of us, who can publish RDFa and search RDFa and build tools that make publishing and searching RDFa easier.

The idea of Stream Reasoning originated in Politecnico di Milano in 2007, when I and Stefano Ceri were helping writing the LarKC project proposal. In the last three years, lot of investigation has been done.

Davide Barbieri, Daniele Braga, Stefano Ceri, Michael Grossniklaus, I defined the notion of RDF Stream together with an extension of SPARQL for continuous querying RDF Stream (i.e., our C-SPARQL). Most recently, we also investigated techniques for incremental reasoning on RDF streams. I was invited to give a key note in NeFoRS 2010 and I though that I should have used this opportunity to tell where Stream Reasoning research got so far.

Click on the image hereafter to see the slides!

Click to go to slideshare

Thanks to Frank van Harmelen and Heiner Stuckenschmidt for helping spreading Stream Reasoning concept.
There’s much more to come.

Keep an eye on