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Re: How to find a proper ontology for my classes and properties?

From: Daniel Schwabe <dschwabe@inf.puc-rio.br>
Date: Sat, 30 Oct 2010 13:31:17 -0200
Cc: Semantic Web <semantic-web@w3.org>
Message-Id: <4E8A5889-2265-4CE6-8D38-98E6B0517FC8@inf.puc-rio.br>
To: Juriy Katkov <katkov.juriy@gmail.com>
Hi Juriy,

On Oct 30, 2010, at 12:40  - 30/10/10, Juriy Katkov wrote:

> Hello everyone! 
> I have 2 questions about rdf data. 
> ...
> 2. Suppose I face the dataset I never use before. What do you usually do first to get a first impression about the dataset? At the moment I first make some SPARQL queries to this dataset, such as: 
> select COUNT(?x) WHERE 
> {
> ?x a ?z .
> }
This is precisely what Explorator [1] is for. You add the SPARQL endpoint (Repositories menu item), and there are some ready-made queries (e.g, Classes, Properties), as well as a search function. There is an "SPO" operator that allows you to easily build queries of <s, p, o> patterns (see the video for examples).

[1] http://www.tecweb.inf.puc-rio.br/explorator


Daniel Schwabe                      Dept. de Informatica, PUC-Rio
Tel:+55-21-3527 1500 r. 4356        R. M. de S. Vicente, 225<br>
Fax: +55-21-3527 1530               Rio de Janeiro, RJ 22453-900, Brasil

Received on Saturday, 30 October 2010 15:31:50 UTC

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