<span class="keyword">typedef</span> <span class="identifier">Derived</span> <a name="boost.units.base_dimension.type"></a><span class="identifier">type</span><span class="special">;</span> <span class="comment">// Provided for mpl compatability. </span>
<span class="special">}</span><span class="special">;</span></pre></div>
<div class="refsect1">
-<a name="idp667637152"></a><h2>Description</h2>
+<a name="idp580050944"></a><h2>Description</h2>
<p>Defines a base dimension. To define a dimension you need to provide the derived class (CRTP) and a unique integer. </p>
<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">my_dimension</span> <span class="special">:</span> <a class="link" href="base_dimension.html" title="Class template base_dimension">boost::units::base_dimension</a><span class="special"><</span><span class="identifier">my_dimension</span><span class="special">,</span> <span class="number">1</span><span class="special">></span> <span class="special">{</span><span class="special">}</span><span class="special">;</span>
</pre>