[ckan-discuss] ckan-discuss Digest, Vol 12, Issue 8

Mehmet Koksal info at mehmet.be
Sat Jan 15 22:22:17 GMT 2011

Dear Friends,

For those of you who will be in Brussels this week, we are organizing a
debate about "Understanding Wikileaks: how it works, how it's being used and
what it means for the world" on Wed 19th Jan :

You are welcome to join us...


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Today's Topics:

   1. [bernard.vatant at mondeca.com: Introducing	Vocabularies of a
      Friend	(VOAF)] (William Waites)


Message: 1
Date: Sat, 15 Jan 2011 05:49:43 +0100
From: William Waites <ww at eris.okfn.org>
Subject: [ckan-discuss] [bernard.vatant at mondeca.com: Introducing
	Vocabularies of a Friend	(VOAF)]
To: ckan-discuss at lists.okfn.org
Message-ID: <20110115044943.GF93585 at styx.org>
Content-Type: text/plain; charset=iso-8859-1

----- Forwarded message from Bernard Vatant <bernard.vatant at mondeca.com>

Date: Fri, 14 Jan 2011 18:51:03 +0100
From: Bernard Vatant <bernard.vatant at mondeca.com>
Subject: Introducing Vocabularies of a Friend (VOAF)
To: Linking Open Data <public-lod at w3.org>
Message-ID: <AANLkTi=aF0UNL+KbsBHOEKO4W6DPFrAE2S_AA-2fdG2P at mail.gmail.com>

Hello all

I'm pleased to announce the first publication of
"Vocabularies of a Friend (VOAF) - Friendly vocabularies for the linked data

Data sets published in the framework of the Linked Open Data Cloud are
relying on a variety of RDFS vocabularies or OWL ontologies.
The aim of VOAF is to provide information on such vocabularies, and in
particular how they rely on each other.
VOAF defines a network of vocabularies the same way FOAF is used to define
networks of people"

VOAF is of course a clear homage to FOAF, which is the hub of the network :
more than half of the listed vocabularies rely on it one way or another.
I've asked Dan Brickley a couple of days ago if he did not mind this
friendly hack. Without answer from him, I just went ahead following the
adage "Qui ne dit mot consent".

More at http://www.mondeca.com/foaf/voaf-doc.html

The VOAF dataset is available as linked data at

This is a work in progress, still a bit sketchy, which hopefully will
benefit from the community feedback.

In particular I've tried to link the vocabularies to the CKAN datasets using
the Tag ontology, for example making explicit the link from
http://xmlns.com/foaf/0.1 to http://ckan.net/tag/format-foaf
Instead of re-inventing a specific attribute I've reused Lexvo, MOAT and Tag
ontologies like in the following, which is might be a bit convoluted for the
purpose at hand.

<voaf:Vocabulary rdf:about="http://xmlns.com/foaf/0.1">
      <moat:Tag rdf:about="http://ckan.net/tag/format-foaf">

I've made sense of quite a bunch of CKAN tags in terms of corresponding
vocabulary used, but there are still quite a few vocabularies w/o
corresponding CKAN tags. If people in charge of CKAN tags see anything I've
missed pleas feel free to push it to me.

And of course any feedback on whatever you would like to see
added/modified/deleted is welcome.

Thanks for your attention.


Bernard Vatant
Senior Consultant
Vocabulary & Data Engineering
Tel:       +33 (0) 971 488 459
Mail:     bernard.vatant at mondeca.com
3, cit? Nollez 75018 Paris France
Web:    http://www.mondeca.com
Blog:    http://mondeca.wordpress.com

----- End forwarded message -----

William Waites                <mailto:ww at styx.org>
http://eris.okfn.org/ww/         <sip:ww at styx.org>
9C7E F636 52F6 1004 E40A  E565 98E3 BBF3 8320 7664


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