<code>employee::ssnumber</code>, respectively.
The specification of an instantiation of <code>member</code> is simple
yet a little contrived:
</p>

<blockquote><pre>
<span class=identifier>member</span><span class=special>&lt;</span><span class=identifier><i>(base type)</i></span><span class=special>,</span><span class=identifier><i>(key type)</i></span><span class=special>,</span><span class=identifier><i>(pointer to member)</i></span><span class=special>&gt;</span>
</pre></blockquote>

<p>
It might seem t