Hugh Glaser wrote:
Hi,
It is possibly useful to sound a bit of a warning about the link (sic)
between Linking, Open, Data and RDF.
So the LOD diagram captures some of this stuff, but there is plenty of other
stuff which is in RDF to Linked Data standards, but doesn't appear because
there are not enough links to or fro.
Then it is not clear that all the LOD diagram can be classed as Open.
And the idea of having a SPARQL endpoint with "all the LOD bubbles" is
problematic (even if we wanted such a thing), since harvesting them would be
a serious problem.
Of course, there are partial harvests, such as the Virtuoso cloud.
To be clear, the partial harvest (as defined by Hugh) is at:
http://lod.openlinksw.com . Note, although it caches a significant chunk
of the bubbles in the LOD cloud, it also plays well with the fundamental
theme of HTTP based Linked Data, by offering outbound links based on
canonical resource URIs.
Example:
1. http://tr.im/EyvK -- this is the URL of an HTML page that describes
entity: http://dbpedia.org/resource/Linked_Data
2. The @href for the text following "About:" contains the canonical
DBpedia Data Space URI for said entity, so click that and you leave the
Local Data Space into the broader Web of Linked Data.
The cache we maintain is all about constructing a major Linked Data
Junction Box on the Linked Data Web, one that services Linked Data aware
apps, services, and agents. Example, our Sponger Middleware which uses
this and other Linked Data Space to generate highly traversable Linked
Data graphs "on the fly".
Anyway, have a SPARQL endpoint is a great starting point, for sure :-)
Kingsley
Best
Hugh
On 08/11/2009 19:22, "Jonathan Gray" <[email protected]> wrote:
Hi Ying!
On Fri, Nov 6, 2009 at 12:28 AM, ying ding <[email protected]> wrote:
It is a great work.
Thanks!
for your sparql endpoint, will this support all the CKAN dataset, means all
the LOD bubbles? Then how should I query. Will you provide some sparql
examples in the future.
Yes - exactly. It would be great to have a version of the LOD diagram
that pointed to the relevant CKAN pages!
There are some SPARQL examples here:
http://lists.okfn.org/pipermail/okfn-help/2009-November/000429.html
Best wishes,
Jonathan
thanks
ying
Jonathan Gray wrote:
We've just blogged about the LOD group on CKAN:
http://blog.okfn.org/2009/11/05/new-linking-open-data-group-on-ckan/
In particular, CKAN's data is now available in RDF and has been
published on the Connected Commons platform:
http://api.talis.com/stores/ckan/services/sparql
--
Ying Ding, Assistant Professor of Information Science
School of Library & Information Science, Indiana University
1320 East 10th Street, Herman B Wells Library, LI025
Bloomington, IN 47405, USA
Tel: (812) 855 5388, Fax: (812) 855 6166
Homepage: http://info.slis.indiana.edu/~dingying/
--
Regards,
Kingsley Idehen Weblog: http://www.openlinksw.com/blog/~kidehen
President & CEO
OpenLink Software Web: http://www.openlinksw.com
