Ontology Web » Software http://www.ontologyweb.com Become a triple in the web! Sun, 31 Jul 2011 13:10:12 +0000 en hourly 1 http://wordpress.org/?v=3.2.1 Triple store http://www.ontologyweb.com/2010/02/triple-store/ http://www.ontologyweb.com/2010/02/triple-store/#comments Tue, 02 Feb 2010 08:52:09 +0000 Working Ontologist http://www.ontologyweb.com/2010/02/triple-store/ Creating à triple store based on mysql. From this triple store several websites are feeded.

]]> http://www.ontologyweb.com/2010/02/triple-store/feed/ 0 RDF stands for Resource Description Framework http://www.ontologyweb.com/2009/12/rdf-stands-for-resource-description-framework/ http://www.ontologyweb.com/2009/12/rdf-stands-for-resource-description-framework/#comments Tue, 08 Dec 2009 08:17:57 +0000 Working Ontologist http://www.ontologyweb.com/?p=173 RDF is short for Resource Description Framework. RDF is the language for describing resources and contents in the semantic web. In the semantic web RDF is used to describe resources on the web. Resources are addressed by a unique URI. A URI looks like a normal Internet URL.

Look at the following fragment of a RDF file:

<?xml version="1.0"?>
<rdf:RDF
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:owl="http://www.w3.org/2002/07/owl#"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema#"
    xmlns="http://example.org/pets#"
    xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
  xml:base="http://example.org/pets">
  <owl:Class rdf:ID="Goldfish">
    <rdfs:subClassOf>
      <owl:Class rdf:ID="Pet"/>
    </rdfs:subClassOf>
  </owl:Class>
  <owl:Class rdf:ID="Cat">
    <rdfs:subClassOf>
      <owl:Class rdf:about="#Pet"/>
    </rdfs:subClassOf>
  </owl:Class>
  <owl:Class rdf:ID="Dog">
    <rdfs:subClassOf>
      <owl:Class rdf:about="#Pet"/>
    </rdfs:subClassOf>
  </owl:Class>
  <owl:Class rdf:ID="Elephant">
    <rdfs:subClassOf>
      <owl:Class rdf:ID="Wild"/>
    </rdfs:subClassOf>
  </owl:Class>
  <owl:Class rdf:about="#Pet">
    <rdfs:subClassOf>
      <owl:Class rdf:ID="Animal"/>
    </rdfs:subClassOf>
  </owl:Class>
  <owl:Class rdf:about="#Wild">
    <rdfs:subClassOf rdf:resource="#Animal"/>
  </owl:Class>
  <owl:Class rdf:ID="Leopard">
    <rdfs:subClassOf rdf:resource="#Wild"/>
  </owl:Class>
  <owl:Class rdf:ID="Tiger">
    <rdfs:subClassOf rdf:resource="#Wild"/>
  </owl:Class>
</rdf:RDF>

]]> http://www.ontologyweb.com/2009/12/rdf-stands-for-resource-description-framework/feed/ 0 Protege 4.0 released http://www.ontologyweb.com/2009/12/protege-4-0-released/ http://www.ontologyweb.com/2009/12/protege-4-0-released/#comments Mon, 07 Dec 2009 13:55:50 +0000 Working Ontologist http://www.ontologyweb.com/?p=147 December 3rd Protege 4.0 was released. So, what is new in this version? First of all it supports the OWL 2.0 specification, which is approaching approval. Other new features in this release are: support for editing multiple ontologies, menu drag and drop user interface elements, the ability to import from repositories on the web and more. Anyway, you can download it here.

]]> http://www.ontologyweb.com/2009/12/protege-4-0-released/feed/ 0 Using SVN in Eclipse with a proxy http://www.ontologyweb.com/2009/12/using-svn-in-eclipse-with-a-proxy/ http://www.ontologyweb.com/2009/12/using-svn-in-eclipse-with-a-proxy/#comments Fri, 04 Dec 2009 13:15:06 +0000 Working Ontologist http://www.ontologyweb.com/?p=141 Are you getting errors about the “RA layer request failed” and “svn: PROPFIND request failed on ..”, followed by an error about not being able to connect to the SVN server? Well, here is what to do:

  • Install the latest Subclipse plugin for Eclipse. Read the manual at Subclipse
  • Set the right proxy settings at the Subversive-config-file (usuallylocated at C:\Documents and Settings\MyUserId\Application Data\Subversion\servers). At the bottom of the file you’ll find http-proxy-host and http-proxy-port. Uncomment these lines and set the right values. Save this file and restart your Eclipse environment.

For me it worked perfectly. Hope this will be useful for you too.

]]> http://www.ontologyweb.com/2009/12/using-svn-in-eclipse-with-a-proxy/feed/ 1 Swoop, Semantic Web Ontology Editor http://www.ontologyweb.com/2009/09/swoop-semantic-web-ontology-editor/ http://www.ontologyweb.com/2009/09/swoop-semantic-web-ontology-editor/#comments Wed, 02 Sep 2009 17:42:32 +0000 Working Ontologist http://www.ontologyweb.com/?p=13 SWOOP is a tool for creating, editing, and debugging OWL ontologies. It was produced by the MIND lab at University of Maryland, College Park, but is now an open source project with contributers from all over.

Visit website

]]> http://www.ontologyweb.com/2009/09/swoop-semantic-web-ontology-editor/feed/ 0 Protégé http://www.ontologyweb.com/2009/09/protege/ http://www.ontologyweb.com/2009/09/protege/#comments Tue, 01 Sep 2009 20:23:07 +0000 Working Ontologist http://www.ontologyweb.com/?p=8 Protégé is a free, open source ontology editor and knowledge-base framework.

The Protégé platform supports two main ways of modeling ontologies via the Protégé-Frames and Protégé-OWL editors. Protégé ontologies can be exported into a variety of formats including RDF(S), OWL, and XML Schema.

Visit website

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