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Re: ANN: sameas.org

From: Hugh Glaser <hg@ecs.soton.ac.uk>
Date: Thu, 4 Jun 2009 23:47:51 +0100
To: Richard Cyganiak <richard@cyganiak.de>
CC: Semantic Web <semantic-web@w3.org>, Linked Data community <public-lod@w3.org>, Ian Millard <icm@ecs.soton.ac.uk>
Message-ID: <EMEW3|d59356ca762b33231741a61bbeea7907l53Nm202hg|ecs.soton.ac.uk|B7FF%hg@ecs.soton.ac.uk>
Hi Richard,
Here goes...

On 04/06/2009 00:54, "Richard Cyganiak" <richard@cyganiak.de> wrote:

> Hugh, Ian,
> 
> Great work -- simple, visually attractive, does what it says on the
> tin. A pleasure to use.
> 
> Question: What can you say about the provenance of the sameAs data?
> The about page doesn't reveal much about this. This is sort of
> important to know before we can decide where and how to use the
> service -- anything that helps me judging the quality of the data
> would be useful. Is it hand-curated, does it contain wild triples from
> the Web, can it be spammed etc.
I have added some stuff on the about page which may go some way towards
answering your question.
> 
> Comments about the RDF output.
> 
> The general RDF graph has the shape
>    <U1> owl:sameAs <U1>, <U2>, <U3>, <U4> .
> 
> I think it would be pretty cool to make it
>    <#this> owl:sameAs <U1>, <U2>, <U3>, <U4> .
> 
> That way, I could add a nice triple to my FOAF file:
> 
>    <#cygri> owl:sameAs
>        
> <http://sameas.org/rdf?uri=http://richard.cyganiak.de/foaf.rdf%23cygri#this
>> .
> 
> (Okay, I like this mostly because of the recursive cleverness of the
> idea. In reality, an rdfs:seeAlso would probably do just fine. But
> isn't owl:sameAs sooo much sexier?)
Ian quite liked the idea, but as you know anything that smacks of generating
a new URI for the existing ones makes me uncomfortable, to say the least.
So he is pondering, and it is possible he will do it, but I don't think anyt
time soon.
> 
> I think the RDF output could do with some extra triples. First, a
> meaningful dc:title for the document URI would be quite nice:
> 
>    <http://sameas.org/rdf?uri=http://richard.cyganiak.de/foaf.rdf%23cygri
>> 
>        dc:title "Co-references from sameAs.org for foaf.rdf#cygri" .
Seems good, goes on the list.
> 
> Then, a foaf:primaryTopic triple would make several tools (most of all
> Tabulator) very happy:
> 
>    <http://sameas.org/rdf?uri=http://richard.cyganiak.de/foaf.rdf%23cygri
>> 
>        foaf:primaryTopic <http://richard.cyganiak.de/foaf.rdf#cygri> .
Probably good as well.
> 
> Furthermore, what about dc:license?
Added some words in the about - any advice as to what the licence might be?
I guess there is some cc licence that corresponds to:
"The information is provided as-is and without any warranty.
It is freely available for any use as you wish."
> 
> In the case of /rdf?q=xxx, some nod in the direction of Sindice, e.g.
> via dc:source pointing to the Sindice RDF result, would be nice.
Good idea - will look at it.
> 
> You might want to put a higher-resolution logo graphic somewhere, so
> that people who use your service can display it, similar to how you
> use the Sindice logo.
The logo was the last thing we did, and I announced before Ian had finished
- I do get enthusiastic, and the workers have to pay :-)
> 
> Again, thanks for this service.
Pleasure - prefix.cc provided some inspiration.
And many thanks for the thoughtful comments.
Hugh
> 
> Richard
> 
> 
> 
> On 3 Jun 2009, at 20:48, Hugh Glaser wrote:
> 
>> We are pleased to offer http://sameas.org/ as a service to provide
>> you with
>> help finding URIs.
>> 
>> It sort of does what it says:- if you provide a URI, it will give
>> you back
>> URIs that may well be co-referent, should any be known to it.
>> In addition, by using sindice.com, if you give it a string, it will
>> provide
>> bundles of URIs that correspond to looking up the string at Sindice
>> and
>> processing them at <sameas>.
>> 
>> Apart from the obvious use of the service through the web-form,
>> simple URIs
>> can be provided to do lookups:
>> http://sameas.org/?uri=http://dbpedia.org/resource/London
>> http://sameas.org/?q=London
>> The following formats are also supported:
>> rdf+xml, text/n3, application/json, text/plain
>> both through content negotiation and also as a specific URI.
>> For example:
>> http://sameas.org/rdf?uri=http://dbpedia.org/resource/London
>> http://sameas.org/n3?uri=http://dbpedia.org/resource/London
>> http://sameas.org/html?uri=http://dbpedia.org/resource/London
>> http://sameas.org/json?uri=http://dbpedia.org/resource/London
>> http://sameas.org/text?uri=http://dbpedia.org/resource/London
>> 
>> We believe that the Semantic Web and Linked Data need to develop
>> clear,
>> focussed, services that only do one or two things, so that they can be
>> composed and utilised by the more complex services, as well as
>> facilitating
>> re-use.
>> We hope that <sameas> fits into that category, and that Linked Data
>> application builders will find it an appropriate and useful service
>> for the
>> important task of discovering co-referent URIs.
>> In addition, by providing formats oriented towards non-Linked Data
>> application, we hope that the use of Linked Data can be spread even
>> wider.
>> 
>> We currently have about 18M URIs, with an average of 3 URIs per
>> bundle.
>> 
>> Best
>> 
>> Ian Millard and Hugh Glaser
>> 
>> 
>> --
>> Hugh Glaser,  Reader
>>               Dependable Systems & Software Engineering
>>               School of Electronics and Computer Science,
>>               University of Southampton,
>>               Southampton SO17 1BJ
>> Work: +44 (0)23 8059 3670, Fax: +44 (0)23 8059 3045
>> Mobile: +44 (0)75 9533 4155, Home: +44 (0)23 8061 5652
>> http://www.ecs.soton.ac.uk/people/hg
>> 
>> "If we have a correct theory but merely prate about it, pigeonhole
>> it, and
>> do not put it into practice, then the theory, however good, is of no
>> significance."
>> 
>> 
> 
> 
Received on Thursday, 4 June 2009 22:48:39 UTC

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