W3C home > Mailing lists > Public > public-lld@w3.org > October 2010

Re: documenting library linked data sets

From: Richard Cyganiak <richard@cyganiak.de>
Date: Thu, 14 Oct 2010 19:42:59 +0100
Cc: Ed Summers <ehs@pobox.com>, public-lld <public-lld@w3.org>, Anja Jentzsch <anja@anjeve.de>
Message-Id: <9CB9CFBE-6F60-49F8-8B68-8CEA1CAED09C@cyganiak.de>
To: Ross Singer <ross.singer@talis.com>
Hi Ross,

I don't know the full background of the discussion here, but just  
wanted to add my €0.02 as a frequent CKAN contributor.

On 14 Oct 2010, at 17:48, Ross Singer wrote:
> I didn't hesitate putting the data sets I manage on CKAN,
> but I would feel less comfortable putting somebody else's data set on
> there for a variety of reasons that I'm not sure I can really
> articulate.

I add packages for other people's data to CKAN all the time. I do a  
search or two first to see if a package has already been created for  
that dataset. If it's not there, I create it. I also update packages  
created by other people, especially to add better descriptions, which  
are often lacking.

And let me say that I think it would be absolutely great if this group  
decided to make an effort to represent the linked library data world  
in CKAN! Anja and Ian Davis and myself did quite a bit of work already  
to cover that area, but there's still a long way to go.

One more thing: CKAN has a feature called “groups” that might be  
useful for you. Groups are collections of packages that can be locked  
down so that only a group admin can add and remove packages from the  
collection. The packages themselves can still be edited by anyone  
though. We use this for the lodcloud group to add an extra level of  


> The wiki page would duplicate a lot of data on CKAN, though, which
> definitely calls into question its purpose.  That said, there's no
> reason they need to be mutually exclusive, I think we just need to be
> sure what the purpose of each actually is.
> In my head, I kind of view CKAN as the authoritative source whereas
> the wiki page might be more of an incubator (with established data
> sets included, as well, for a more comprehensive picture) or put the
> data sets into some context (in use, with how they could be used with
> each other, perceived value, etc.), but, honestly I could go either
> way on this.
> If the group thinks that people would actually add these sets to CKAN
> (and we have a clear way to isolate the packages we would be including
> on this wiki page), then I say we just use CKAN.
> -Ross.
> On Thu, Oct 14, 2010 at 11:41 AM, Ed Summers <ehs@pobox.com> wrote:
>> Unfortunately I've missed the last 2 telecons (accidentally) and the
>> discussion around creating a template for library linked data sets
>> [1]. I don't know how many people noticed that the current Linked  
>> Data
>> Cloud [2] (which contains several pools of library linked data) is
>> being generated from the Comprehensive Knowledge Archive Network [3],
>> which is essentially a wiki for describing data sets that are
>> available on the web.
>> Richard Cyganiak, Anja Jentzsch and other members of the linked data
>> community spent a bit of time entering in all the known public linked
>> data sets, and documenting their attributes and links to one another.
>> I strongly encourage any effort that the LLD group do in this area to
>> leverage this work. The big advantages are:
>> * they already have useful templates for describing library linked  
>> data
>> * they already have a significant portion of the linked data universe
>> documented there (including linked library data)
>> * if we work on CKAN (anyone can) we can help make the descriptions  
>> of
>> library data better
>> * we can modify the templates to fill any gaps
>> * our efforts will be automatically represented in the linked data  
>> cloud diagram
>> I guess we should make sure that this use of the lodcloud group would
>> be OK with Richard and Anja though.
>> //Ed
>> PS. The CKAN linked data sets can be seen in this dynamic (hard to
>> read) visualization I hacked together which gets regenerated every
>> hour using the CKAN API.
>> [1] http://www.w3.org/2005/Incubator/lld/minutes/2010/10/07-lld-minutes.html#action11
>> [2] http://richard.cyganiak.de/2007/10/lod/
>> [3] http://ckan.net/group/lodcloud
>> [4] http://inkdroid.org/lod-graph/
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Received on Thursday, 14 October 2010 18:43:36 UTC

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