Merge pull request #612 from w3c/dcat-issue431

Addressing issue 431

dcat/index.html

@@ -135,7 +135,7 @@ <h2>Vocabulary overview</h2>
     <p>DCAT is an RDF vocabulary well-suited to representing data catalogs such as <a href="https://www.data.gov/">data.gov</a> and <a href="https://data.gov.uk">data.gov.uk</a>. DCAT defines eight main classes:</p>
     <ul>
         <li> <code><a href="#Class:Catalog">dcat:Catalog</a></code> represents the catalog</li>
-        <li> <code><a href="#Class:Resource">dcat:Resource</a></code> represents an item described by an entry in a catalog.</li>
+        <li> <code><a href="#Class:Resource">dcat:Resource</a></code> represents an item described by an entry in a catalog, and carries the properties common to any resource that can be catalogued. This class is the parent class of <code><a href="#Class:Dataset">dcat:Dataset</a></code>, <code><a href="#Class:Data_Service">dcat:DataService</a></code> and <code><a href="#Class:Catalog">dcat:Catalog</a></code>. A specific sub-class should be used when available.</li>
         <li> <code><a href="#Class:Dataset">dcat:Dataset</a></code> represents a dataset in a catalog.</li>
         <li> <code><a href="#Class:Distribution">dcat:Distribution</a></code> represents an accessible form or representation of a dataset as for example a downloadable file.</li>
         <li> <code><a href="#Class:Data_Service">dcat:DataService</a></code> represents a data service in a catalog. Example data services include data distribution services and data discovery services.</li>