- From: Keith Alexander <k.j.w.alexander@gmail.com>
- Date: Mon, 14 Mar 2011 13:18:58 +0000
- To: Martin Hepp <martin.hepp@ebusiness-unibw.org>
- Cc: Christopher Gutteridge <cjg@ecs.soton.ac.uk>, Dieter Fensel <dieter.fensel@sti2.at>, Kingsley Idehen <kidehen@openlinksw.com>, Linked Data community <public-lod@w3.org>, semantic-web <semantic-web@w3.org>
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
Received on Monday, 14 March 2011 13:39:33 UTC