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OWL 2 and how to cite it

Oct 27 2009. It's done! The OWL 2 Web Ontology Language is a W3C Recommendation. Many OWL tools are already compatible with the new specs, and it is expected that all are transitioning to the newer version. OWL 2 consists of many (13) documents, but it has a short overview document and an extended Primer as entry points.

Thus, only one question is left open: how should you cite the new standard? I recommend the following bibtex entries for the aforementioned references:

@book{owl2-overview,
 author    = {W3C {OWL Working Group}},
 title     = {{OWL~2 Web Ontology Language: Document Overview}},
 publisher = {W3C Recommendation},
 note      = {Available at \url{http://www.w3.org/TR/owl2-overview/}},
 year      = {27 October 2009}
}

@book{owl2-primer,
 editor    = {Pascal Hitzler and Markus Kr\"{o}tzsch and Bijan Parsia and
              Peter F. Patel-Schneider and Sebastian Rudolph},
 title     = {{OWL~2 Web Ontology Language: Primer}},
 publisher = {W3C Recommendation},
 note      = {Available at \url{http://www.w3.org/TR/owl2-primer/}},
 year      = {27 October 2009}
}

Yes, using @book is a good idea here: bibtex recommends picking reference types by appearance, not by name (and there is no @w3cstandard anyway). The other documents can be cited like the Primer (I just use author for the overview since editor would look inappropriate at this place).

Of course you could also cite a textbook on OWL 2 ;-)

en Special:Ask

HTML5, RDFa, fights about web semantics

Jul 8 2009. The recent events in the ongoing HTML5 vs. XHTML war, quite unfortunately, are utilised by some to restart a battle of RDFa vs. microformats that appears to be rather pointless. Read more …

Theory or Research?

May 5 2009. When doing a review for an IEEE journal, I have been asked to respond to the following question:

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Spam without purpose

15 Dec 2008. A spam mail I just received asks me to buy an oil tanker (7,000dwt). Apparently, I am not the first to get such offers. The obvious question is: why? (I note that there is no attachement, no suspicious or different HTML component, not even links to browse to). So here are some hypotheses.Read more …

Call for tourists

Sep 17 2008. For making a scientific conference a success, it is of course important to phrase the call for papers in a way that attracts contributions. So what should be written in the first paragraph? Read more …

Hard wear

Sep 3 2008. Riding a caster board is a great way of getting to work. It is still important to wear protective gear. In my case, this was my rucksack, filled with a Thinkpad T41p as an additional shock absorber. It still works, though the screen dangles a little on the side where the metal joint has burst. But sitting crouched in front of this laptop for years, my spine had already suffered enough – it was about time for the machine to give something back!

How I changed the world

Aug 25 2008. Of course, we all want to change the world, don't we? But in the age of the Web, we may often do so without actually noticing. Quite incidentally, I found out yesterday that I have contributed to possibly thousands of web pages. My contribution is the following:



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Semantic MediaWiki 1.2: bringing OWL to the Web

Jul 11 2008. After a lot of work it finally done: version 1.2 of Semantic MediaWiki has been released and is available for download. The new release does of course include many new features, but it also has some interesting additions regarding proper Semantic Web technologies. Read more …

Semantic Web reloaded

Apr 25 2008. After quite some work during the last week, semanticweb.org now has received a new look and content organisation that is more suitable for the «Homepage of the Semantic Web». The existing content of the former ontoworld.org turned out to be rather more promissing than expected: interesting collections not only of events and people, but also of tools and ontologies did in fact exist. Now it is at the community to take the chance of using this very visible platform for advertising their work. As far as I recon, I better hire some students to support them …

Semantic MediaWiki 1.1 released

Apr 20 2008. The new version of Semantic MediaWiki, SMW 1.1, is now available for download. Upgrade from SMW 1.0(.1) is very simple and needs no special scripts, but you will need MediaWiki >=1.11 now. SMW1.1 was tested up to MW1.13 alpha. Besides the mandatory bugfixes, the new release brings various additional features. Read more …

Semantic Web Chicken Farms

Feb 8 2008. The Semantic Web community has long contemplated about its very own version of the infamous Chicken and Egg Problem: is it the semantic data or the application for that data that appears first? We always considered Semantic MediaWiki to be an answer to that issue, but now I learned that this is true in rather unexpected ways. More …

Happy New Year!

Jan 23 2008. While the world's new year is already three weeks old, and the Year of the Pig still lasts for almost three weeks, Germany has started a new year today: The Year of Mathematics (German link). Good astrological conditions for getting my dissertation done …

The Past and Future of Ideas

Jan 18 2008. As Lawrence Lessig – law professor, free-culture proponent, and gifted speaker – announced on Tuesday [1], his latest book «The Future of Ideas» is now free. Download it at the-future-of-ideas.com. Note that the latter should not be confused with what may once become the past of ideas.

Mislead by Intuition(ism)

Jan 14 2008. Sure, I could have seen that earlier. Instead, I spent quite some time pondering about how to use intuitionistic semantics as an approximation for faster ontological reasoning. I still claim that this is not completely stupid: intuitionistic logic is known to be strictly weaker than the classical Boolean calculus, and it thus allows us to conclude only some of the classical consequences of, say, an ontological theory. For that purpose it introduces weaker forms of implication and universal quantification, and does not allow for a classical negation operator. So couldn't there be an interesting fragment of intuitionistic logic that is easier to compute with, while still giving a lot of interesting consequences? Probably not – at least I will show below how even weak intuitionistic negation leads to computational intractability. Read more …

Semantic MediaWiki 1.0 is available

Dec 31 2007. After a lot of holiday programming, the first stable version of Semantic MediaWiki, SMW 1.0, is now available for download. Among numerous improvements, it introduces semantic RSS feeds, that will also see much use on this site. Read more …

How to escape McDonald’s

Nov 8 2007. Vegetarians like me of course tend to avoid certain vendors of digestibles (shall we say «food»?), but the industry seems to have misunderstood my wish of escaping them as often as possible:

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Using SMW for content management

Sep 15 2007. After quite some setup time, I finally got a first functional version of my homepage running. As this probably is also the first example of how to use Semantic MediaWiki as a personal content management system, I will take some time to explain the necessary setup steps. Read more …

Improved site style

Jan 18 2007. Site cleaned up, fixed (most of) the style to work with IE. Open issues: upgrade to MediaWiki 1.9 and install Semantic MediaWiki. Unfortunately, this requires PHP 5 to be installed first.

Canon EOS 400D and Linux

Nov 2 2006. Added some notes on running Canon EOS 400D under Linux.

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