Wikidata aims to create a free knowledge base about the world that can be read and edited by humans and machines alike. It will provide data in all the languages of the Wikimedia projects, and allow for the central access to data in a similar vein as Wikimedia Commons does for multimedia files. Wikidata is proposed as a new Wikimedia hosted and maintained project.

RT @mischatuffield: This is really great news : #wikipedia #data #semweb #dbpedia #webinf #inls520

Wikipedia's category hierarchy forms a graph. It's definitely cyclic (Category:Ethology belongs to Category:Behavior, which in turn belongs to Category:Ethology).

At any rate, did you know that "Chicago Stags coaches" are a subcategory of "Natural sciences"?

Wikipedia Miner is a toolkit for navigating and making use of the structure and content of Wikipedia. It aims to make it easy for you to integrate Wikipedia's knowledge into your own applications, by:

providing simplified, object-oriented access to Wikipedia's structure and content.
measuring how terms and concepts in Wikipedia are connected to each other.
detecting and disambiguating Wikipedia topics when they are mentioned in documents.

Wikipedia Miner is a toolkit for navigating and making use of the structure and content of Wikipedia. It aims to make it easy for you to integrate Wikipedia's knowledge into your own applications, by:

providing simplified, object-oriented access to Wikipedia's structure and content.
measuring how terms and concepts in Wikipedia are connected to each other.
detecting and disambiguating Wikipedia topics when they are mentioned in documents.

Yes, it's true that the accepted date of 7 September 1940 as the start of the London Blitz is a bit misleading, since there was a non-trivial amount of bombing before that date (e.g. see here). Judging from contemporary press accounts, 7 September certainly seemed to mark an important change in German bombing strategy, but more one of quantity than quality -- almost more an inflection point than a turning point. In retrospect we tend not to see it that way, which is fine. But we could recognise that -- leaving aside the eventual reification involved in the name 'the Blitz' itself -- the 'start of the Blitz' was less clearly defined then than it seems now.
But this is not what the Wikipedia article is talking about. Instead it chooses an equally precise date for the start of the Blitz, 6 September, and says that this is more accurate than 7 September.

This wiki contains the infobox-to-ontology and the table-to-ontology mappings which are used by the DBpedia extraction framework as well as the ontology definition itself. The framework collects the templates defined in this Wiki and extracts the Wikipedia content according to them.

This dataset contains a 320 GB sample of the data used to power trendingtopics.org. It includes 7 months of hourly page traffic statistics for over 2.5 Million wikipedia articles (~ 1 TB uncompressed) along with the associated wikipedia content, linkgraph, & metadata.

OpenLink Software provides a backup up of the current DBpedia 3.2 Database as hosted on the live service at http://dbpedia.org/, that users can restore into a Virtuoso EC2 AMI instance in the cloud, providing them with an instance of DBpedia for their own use.

"History" subheading lists major events in country's history.

The DBpedia Ontology is a shallow, cross-domain ontology, which has been manually created based on the most commonly used infoboxes within Wikipedia. The ontology currently covers over 170 classes which form a subsumption hierarchy and has 940 properties.

"On the the Wikipedia page for what_happened they gonna show Cornelius leavin' this club with that dancer just now"

We’ve mapped 350 Wikipedia templates with 2,200 properties to 170 DBpedia classes and 900 class properties. By hand.

Changing wiki content through the API is possible, but must be explicitly enabled by setting $wgEnableWriteAPI = true; in LocalSettings.php (this feature is enabled on Wikimedia wikis).

Mwclient is a client to the MediaWiki API <http://mediawiki.org/wiki/API> and allows access to almost all implemented API functions.

Proof-of-concept based on vacuuming every Wikipedia article into the Lucene open source search engine to build a text categorisation tool prototype.

Wikipedia hype meets harsh reality:

http://meta.wikimedia.org/wiki/Meta:Community_petition
(Wikipedia site version) [via Danny Wool]

I'll simply quote it, since it says all that needs to be said:

Petition to the Wikimedia Foundation Board of Trustees:

We, volunteers, ask the Board to give the volunteer community a fair
voice in Foundation governance. During its most recent meeting, the
Board of Trustees not only rejected a proposal to improve community
input in Foundation matters, but implemented an unexpected
restructuring to reduce the community seats on the board. The
community was not consulted about this reduction in representation and
the board provided no explanation for this change.
[1]

That is not a good way to treat people who donate their time and
labor. The volunteer base made this the seventh most popular website
in the world. We expect courtesy and respect, but received neither.
That hurts morale.

Please provide a full explanation for recent board decisions and
reconsider your top-down approach.

I keep telling the people who donate much of their time to Wikipedia:
Don't ever risk anything for Wikipedia, since it won't risk anything
for you. You're fed a line about "community" and "knowledge",
but you're utterly powerless. And when it comes down to a crunch,
you're merely unpaid labor with no rights, who can be discarded at a
moment's notice.

And if you think I'm just a bombastic critic, well,
he said it, not me
(Brad Patrick, former Wikimedia Foundation general counsel and interim executive director) [via "Durova"]

It would be best for those critical of the Board (and feeling that the
community is the most important ideal) to remember that whether you like it
or not, agree with it or not, or would have selected an alternative reality
or not, it is still the case that the Board is that which governs the
Wikimedia Foundation, ... As is oft-repeated, WMF is not a membership
organization.

Within the spirit of civil discourse, to those who are feeling frustrated
and demanding action, I submit - "so what are you going to do about it?" I
suggest you be pragmatic. You do not have any means of grabbing the reins
of power from the Board, and you don't have any entitlement to anything
except your ability to participate in a project, if you choose, a chapter,
if you choose, or to speak up in some forum. You don't have a "right" to
vote on anything, and the Board could just as easily have a contest than an
election to fill Board seats. [... snip]

Stop whining and ask yourself if you have the objective qualifications to
lead an international organization. If not, work on obtaining the skills to
be such a leader, if you choose. Toiling on a project is neither a
necessary nor sufficient condition to be a Board member at WMF.

Or, get back to the data-mines, suckers.

The funniest thing about this is Jimmy Wales has been appointed a
special slot that's counted as a "community" seat.

They said it, I didn't:

Profit-oriented Wikia eying IPO in long term

Wikia Inc., a profit-oriented company set up by Wikipedia co-founder
Jimmy Wales, is aiming for a public listing in the long term, he said Thursday. ...

Wales said Wikia has funding from venture capital and seeking an
initial public offering "is sort of the path we are going to take."
But he said had no timeframe for such a listing for the San
Mateo, California-based Wikia right now.

Now let's compare
this interview:

IBD: Why would anyone volunteer to do this?

Wales: The main reason is that it's fun for them.

YOU get to have "fun". HE gets very rich from an IPO.

And people wonder why I'm such a spoilsport :-(.

Resources of type "Era" in DBpedia.