2.4. Fqn クラス

   // Create an Fqn pointing to node 'Joe' under parent node 'Smith'
   // under the 'people' section of the tree
	    
   // Parse it from a String
   Fqn abc = Fqn.fromString("/people/Smith/Joe/");
	    
   // Here we want to use types other than String
   Fqn acctFqn = Fqn.fromElements("accounts", "NY", new Integer(12345));

Fqn f = Fqn.fromElements("a", "b", "c");

Fqn f = Fqn.fromString("/a/b/c");