What does this mean in C++
<p>I've encountered this in Visual C++ applications</p>

<pre><code>extern map&lt;string, rpcfn_type&gt; mapCallTable;
</code></pre>

<p>or</p>

<pre><code> map&lt;string, string&gt;
</code></pre>

<p>What does it mean? Not the map thing, but the </p>

<pre><code>&lt;string, string&gt; 
</code></pre>

<p>part</p>
