he traits template is:
<pre><code>
template&lt;
    class T,       
    int Level, 
    int Tracking,
    unsigned int Version = 0,
    class ETII = BOOST_SERIALIZATION_DEFAULT_TYPE_INFO(T),
    class IsWrapper = mpl::false_
&gt;
struct traits
</code></pre>
and template parameters should be assigned according to the following table:
<p>
<table border>
<tr><th align=left>parameter</th><th align=left>description</th><th align=left>permitted values</th><th align=left>default value</th></tr>
<tr><td><code>T</co