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Re: Get your dataset on the next LOD cloud diagram

From: Tom Heath <tom.heath@talis.com>
Date: Wed, 13 Jul 2011 15:26:43 +0200
Message-ID: <CAJtGsriAXBtijezqCSUrDBYrcq1VdLJs11UKFgUKWPKvVxV1gw@mail.gmail.com>
To: Leigh Dodds <leigh.dodds@talis.com>
Cc: Bernard Vatant <bernard.vatant@mondeca.com>, public-lod <public-lod@w3.org>, Semantic Web <semantic-web@w3.org>
Hi all,

On 13 July 2011 14:11, Leigh Dodds <leigh.dodds@talis.com> wrote:
> Hi,
> On 13 July 2011 13:05, Bernard Vatant <bernard.vatant@mondeca.com> wrote:
>> Re. availability, just a reminder of SPARQL Endpoints Status service
>> http://labs.mondeca.com/sparqlEndpointsStatus/index.html
>> As of today 80% (192/240) endpoints registered at CKAN are up and running.
>> Monitor grey dots (still alive?) for candidate passed out datasets ...
> Well as Kingsley pointed out SPARQL is only one metric. Whether the
> URIs still resolve is arguably most important for the Linked Data
> diagram, but service availability is a good thing to monitor.

+1 to Kingsley and Leigh's comments about the (questionable) value of
the existence/availability of SPARQL endpoints as a measure of the
"aliveness" of a data set.

Availability of dumps is also a questionable metric, as many data sets
will never have one. This may be because the data set is implemented
as a wrapper around another API (so never fully materialised), or
because the licensing terms of the data are not amenable to sharing

On that note, many people talk about the "LOD Cloud" (rather than the
more general "Linked Data Cloud"), but as Leigh demonstrated back in
2009 there is little clarity about the licensing terms of many of the
data sets in the cloud, and I doubt the situation has changed much in
the last two years; i.e. there's no guarantee of the O in LOD. More
licensing clarity is important if we're expecting people to reuse our
data, but universal openness of Linked Data in the Web is unrealistic
for the foreseeable future, likewise universal availability of dumps.



Dr Tom Heath
Lead Researcher
Talis Systems Ltd
W: http://www.talis.com/
W: http://tomheath.com/id/me

Talis Systems Ltd is a company registered in England and Wales.
Registered number: 07196440. Registered office: 43 Temple Row,
Birmingham, B2 5LS, United Kingdom.
Received on Wednesday, 13 July 2011 13:27:16 UTC

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