[ckan-discuss] Next version of the LOD cloud diagram. Please provide input, so that your dataset is included.

Rufus Pollock rufus.pollock at okfn.org
Sat Sep 25 13:04:26 BST 2010

On 25 September 2010 12:22, Ed Summers <ehs at pobox.com> wrote:
> Thanks for the responses Rufus and Richard. I noticed that my little
> script that updates the graph data started getting a 403 for the
> (new?) bibbase package?
>    http://ckan.net/api/rest/package/bibbase

If this package has been deleted you'll get a 403. This is a known
'feature'. The logic is that someone with higher privileges (e.g.
sysadmin) could look at this package. There has already been
suggestion that from user perspective a 404 would make more sense.

> I am skipping over it for the time being, but I was wondering if there
> might be something wrong, or if it is in some embargoed space. I can't
> seem to find it in CKAN proper, but it is in the lodcloud group:
>    http://ckan.net/api/rest/group/lodcloud

If it is indeed deleted then this is a 'bug' in that it should not
show up there.

> Oh, and thanks for the sunburst example. I've been fishing around for
> examples of how to manipulate the visualization with external
> controls.

Not at all. I'm also playing around a lot with hierarchical data but
that is off-topic!


> //Ed
> On Sat, Sep 25, 2010 at 6:47 AM, Rufus Pollock <rufus.pollock at okfn.org> wrote:
>> On 23 September 2010 06:18, Ed Summers <ehs at pobox.com> wrote:
>>> It was awesome to see that the new LOD Cloud leverages data in CKAN. I
>>> really like the idea of driving more people to documenting Linked Data
>>> packages on CKAN in order to get their content into the LOD Cloud.
>>> I have been doing a bit of playing around with the Protovis JavaScript
>>> library recently to visualize owl:sameAs links in the Billion Triple
>>> Challenge dataset [1]. It's pretty easy to use, at least in the
>> That's fantastic. I've been *really* impressed by protovis and that's
>> a really nice usage of their force directed layout!
>> (I've been using protovis for where does my money go sutff e.g.:
>> <http://www.wheredoesmymoneygo.org/wdmmg-js/src/sunburst.html>)
>>> simplistic way I have been playing around with it. I thought it would
>>> be fun to use the same approach to graphing the LOD Cloud using the
>>> CKAN API. So I went and did it [2]. The fact that it only took an hour
>>> or so was all due to the way you have leveraged CKAN, and CKAN's
>>> lovely REST API.
>> Thanks :)
>>> While processing the data I think I noticed 50 packages in the
>>> lodcloud group which referenced other CKAN packages
>>> (package['extras']['links:*'] in the json) that were not also in the
>>> lodcloud group. I didn't actually dig in to see if they are definitely
>>> on CKAN, but at least a few of them already were. I haven't been
>>> following the earlier discussion too closely, to know if this is
>>> already a known issue. I'd be willing to help add the packages to the
>>> lodcloud group if you are looking for an extra set of hands.
>> Richard's answered on this so I won't add anything (plus he's the expert!).
>> [...]
>> Regards,
>> rufus

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