ss="toc-backref" href="#id4">&quot;Fred's Info&quot; Revisited</a></h2>
<p>Here's what the example above looks like using the
<tt class="docutils literal"><span class="pre">dynamic_properties</span></tt> interface:</p>
<pre class="literal-block">
void manipulate_freds_info(boost::dynamic_properties&amp; properties)
{
  using boost::get;
  std::string fred = &quot;Fred&quot;;

  int old_age = get&lt;int&gt;(&quot;age&quot;, properties, fred);
  std::string old_gpa = get(&quot;gpa&quot;, properties, fred);

 