des a kind of factory, so that the user can add one or more
instances of the catalog at will. You may instead register a <code>CatalogReader</code> instance directly in
your layer in the folder <code>Plugins/XML/UserCatalogs/</code>; such catalogs will be preinstalled and not
deletable.</p>

<h3>Forte for Java 3.0 Specifics Feature</h3>

If a catalog implements <tt>Serializable</tt> interface then
its mounting point is <b>persistent</b> among IDE restarts. In such case it is
highly recommended to explicitly