s="comment">// In header: &lt;<a class="link" href="../../boost_units/Reference.html#header.boost.units.is_unit_of_system_hpp" title="Header &lt;boost/units/is_unit_of_system.hpp&gt;">boost/units/is_unit_of_system.hpp</a>&gt;

</span><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> Dim<span class="special">,</span> <span class="keyword">typename</span> System<span class="special">&gt;</span> 
<span class="keyword">struct</span> <a class="link" href=