Update dcat/index.html

Co-authored-by: Riccardo Albertoni <albertoni@ge.imati.cnr.it>

dcat/index.html

@@ -3325,7 +3325,7 @@ <h2>Version types</h2>
 <section id="version-info">
 <h2>Version information</h2>
 
-<p>Besides the relationships illustrated in the previous section, versioned resources may be associated with additional information, describing, e.g., their differences with the original resource (the version "delta").</p>
+<p>Besides the relationships illustrated in the previous section, versioned resources may be associated with additional information, describing, e.g., their differences with the original resource (the version "delta"),  the version identifier, and release date.</p>
 
 <p>Two typical examples are (a) a description (textual or machine-actionable) of the changes between the current and the previous version of a resource, and (b) whether the new version of the resource is backward compatible or not with the previous version (this is particularly relevant when the resource is used by given applications, so it is fundamental to know if the new version can be also used with them).</p>