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Linked data - how much linking ?

Linked data - how much linking ?
Posted on: Tue, 09/08/2009 - 06:12
paul.wilton@bbc...
User offline. Last seen 2 years 36 weeks ago. Offline
Joined: 08/28/2009

Hi

I am interested in using calais to generate dbpedia/linked data concept extractions from news articles. I have been experimenting with the REST api, to perform a calais concept extraction, and then re-requesting json formatted responses for the main calais terms extracted, to pick up the same-as linked data.

However, not many (if any) of the calais terms produce same-as data, even though dbpedia entries doe xist in dbpedia.

For example, a concept extraction on a BBC sports artical about Andy Murray, generates a number of calais terms , ranked accordingly (this is all teally good!), eg:

Andy Murray:  http://d.opencalais.com/pershash-1/ae42bfe1-508c-3b0e-9c1c-d22ba48643e9

Roger Federer: http://d.opencalais.com/pershash-1/6b9485f5-dc32-3879-b0d4-cce73c363a0a

Now, both Andy Murray and Roger Federer both have dbpedia topics, but when the Calais terms are requested (as JSON):

http://d.opencalais.com/pershash-1/ae42bfe1-508c-3b0e-9c1c-d22ba48643e9....

http://d.opencalais.com/pershash-1/6b9485f5-dc32-3879-b0d4-cce73c363a0a....

neither produce same-as links to their dbpedia equivalents ?

So, am I missing something, or is the linked-data querying very sparse and imcomplete with respect to dbpedia ?

Thanks for any help

Paul

 

 

 

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Issues
Posted on: Sat, 12/04/2010 - 19:16 #1
leemonte
User offline. Last seen 1 year 24 weeks ago. Offline
Joined: 12/04/2010

Are these issues been resolved?
Web development and Website Development

Links to DBpedia too far in the redirects?
Posted on: Mon, 11/01/2010 - 13:47 #2
pablomendes
User offline. Last seen 1 year 28 weeks ago. Offline
Joined: 10/25/2010

Hi all,
I have the same use case as Paul (who started this thread). Like him, I also get a JSON with the annotations, grab all entities of interest, then dereference them in order to obtain DBpedia sameAs links. But it seems I'm going the longer route here.

For example, the entity URIs I get from the annotation service are like this:

IBM
http://d.opencalais.com/comphash-1/7c375e93-de13-3f56-a42d-add43142d9d1


When I try to dereference that, I get a proprietary non-standard (non-HTTP) redirect:

<cld:redirection rdf:resource="http://d.opencalais.com/er/company/ralg-tr1r/9e3f6c34-aa6b-3a3b-b221-a07aa7933633"/>


Connecting to that URI I can see a couple of sameAs (including one to paid content), but none to DBpedia

<owl:sameAs rdf:resource="http://cb.semsol.org/company/ibm#self"/>
<owl:sameAs rdf:resource="http://p.opencalais.com/er/company/ralg-tr1r/9e3f6c34-aa6b-3a3b-b221-a07aa7933633"/>


What's happening? Maybe the bug I observed in the interface is actually in the server-side?

Why so many indirections?
Any chances you guys will make this process a bit friendlier?

Cheers,
Pablo

Disappearing observed as well
Posted on: Tue, 10/26/2010 - 08:35 #3
pablomendes
User offline. Last seen 1 year 28 weeks ago. Offline
Joined: 10/25/2010

Hi all,
I have also noticed that sometimes the web page for an entity "hides" the sameAs link to DBpedia, or the Aliases. Reloading the page sometimes gives different results. Try reloading the page many times and you'll notice the behavior.

Looks like a bug in the interface?

Pablo

Disappearing observed as well
Posted on: Tue, 10/26/2010 - 16:12 #4
sumitshah
User offline. Last seen 1 year 27 weeks ago. Offline
Joined: 12/15/2008

Hi Pablo,
This definitely sounds like a bug. We will take a look at the logs, meanwhile can you provide us the link where you see this behavior?

thanks
sumit

The one for IBM, from the
Posted on: Wed, 10/27/2010 - 05:27 #5
pablomendes
User offline. Last seen 1 year 28 weeks ago. Offline
Joined: 10/25/2010

The one for IBM, from the documentation:
http://d.opencalais.com/er/company/ralg-tr1r/9e3f6c34-aa6b-3a3b-b221-a07aa7933633

Got the link from here.
http://www.opencalais.com/documentation/linked-data-entities

Using Mozilla Firefox 3.6.11 on Windows Vista.

Same behaviour for Rio_Tinto
Posted on: Wed, 11/03/2010 - 07:19 #6
remimix
User offline. Last seen 19 weeks 2 days ago. Offline
Joined: 12/16/2009

The one for Rio Tinto is working randomly (need to refresh the page several times to get the sameAs :
http://d.opencalais.com/er/company/ralg-tr1r/ec3b7ab9-15f5-31a3-8231-6cba75adeb1a.html

Using Mozilla Firefox 3.6.12 on Ubuntu.

Any news on this bug?
Looks quite annoying :)

No more sameAs links
Posted on: Mon, 12/21/2009 - 09:25 #7
remimix
User offline. Last seen 19 weeks 2 days ago. Offline
Joined: 12/16/2009

Hi all,

I am using this thread to ask a question you should obviously have the the answer. In your examples given in http://www.opencalais.com/documentation/linked-data-entities the links to the LinkedData (sameAs to freebase or dbpedia) just disapeared. Even for the examples (IBM) these sameAs links are not there anymore.

Is it a bug? Is there a change in the API I did not see?

Thanks in advance!

should be added soon
Posted on: Fri, 09/18/2009 - 15:07 #8
sumitshah
User offline. Last seen 1 year 27 weeks ago. Offline
Joined: 12/15/2008

Hi Paul,
We are expanding the list of entities we have linked data for. The entities we have linked for now are listed at http://www.opencalais.com/documentation/linked-data-entities. We will be adding more soon.

Thanks.
sumit