What does the paragraph of "NOTA BENE" in stl_list.h mean?
<p>I'm a newbie on cplusplus, and thanks for answering my questions.</p>

<p>The paragraph in the stl_list.h is read as follow:</p>

<pre><code>// NOTA BENE
// The stored instance is not actually of "allocator_type"'s
// type.  Instead we rebind the type to
// Allocator&lt;List_node&lt;Tp&gt;&gt;, which according to [20.1.5]/4
// should probably be the same.  List_node&lt;Tp&gt; is not the same
// size as Tp (it's two pointers larger), and specializations on
// Tp may go unused because List_node&lt;Tp&gt; is being bound
// instead.
//
// We put this to the test in the constructors and in
// get_allocator, where we use conversions between
// allocator_type and _Node_alloc_type. The conversion is
// required by table 32 in [20.1.5].
</code></pre>

<ol>
<li>Where can I find the [20.1.5]/4 and the table 32 stuffs like that??</li>
<li>Why is the specializations on Tp may go unused? What does this actually mean? (If you can provide a piece of simple source code and a simple explanation, I'll really be appreciate it.)</li>
<li>What if people do need the specializations, is there a way to hack it??:)</li>
</ol>
