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Re: data schema / vocabulary / ontology / repositories

From: Antoine Zimmermann <antoine.zimmermann@insa-lyon.fr>
Date: Mon, 14 Mar 2011 15:45:13 +0100
Message-ID: <4D7E29F9.80705@insa-lyon.fr>
To: Keith Alexander <k.j.w.alexander@gmail.com>
CC: Linked Data community <public-lod@w3.org>, semantic-web <semantic-web@w3.org>

Could you please add a few words about SchemaCache on this wiki page:


Thanks and regards,

Le 14/03/2011 14:18, Keith Alexander a écrit :
> On Mon, Mar 14, 2011 at 8:28 AM, Martin Hepp
> <martin.hepp@ebusiness-unibw.org>  wrote:
>> Hi Dieter:
>> There are several ontology repositories available on-line, but to my knowledge they all suffer from two serious limitations:
>> 1. They do not rate ontologies by quality/relevance/popularity, so you do not get any hint whether foaf:Organization or foo:Organization will be the best way to expose your data.
> Schemacache[1] used to order results by the number of documents
> Sindice found it it, but this wasn't terribly effective; what we want
> is  something more like "number of individual publishers using term X"
> rather than "number of individual documents using term X".
> I could work this out without too much difficulty from the VoID
> descriptions published by CKAN[2] if more dataset descriptions listed
> void:exampleResources  (around half of them don't), and if more VoID
> dataset descriptions specified the dct:publisher and dct:creator of
> the dataset, this would also be useful.
>> 2. The selection of ontologies listed is, to say the best, often biased or partly a random choice. I do not know any repository that
>> - has a broad coverage,
>> - includes the top 25 linked data ontologies and
>> - lists more non-toy ontologies than abandoned PhD project prototypes.
>> The most useful tool for your purpose is likely
>>    http://prefix.cc/popular/all
> Schemacache used to be  rather  polluted with abandoned and toy
> ontologies, but in November last year I started afresh with only the
> namespaces registered on http://prefix.cc
> The search results are now much more likely to be useful, though there
> is still the odd bit of junk in there, and there is certainly room for
> improvement.
> [1] http://schemacache.com
> [2] http://semantic.ckan.net/sparql

Antoine Zimmermann
Researcher at:
Laboratoire d'InfoRmatique en Image et Systèmes d'information
Database Group
7 Avenue Jean Capelle
69621 Villeurbanne Cedex
Lecturer at:
Institut National des Sciences Appliquées de Lyon
20 Avenue Albert Einstein
69621 Villeurbanne Cedex
Received on Monday, 14 March 2011 14:45:49 UTC

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