ost_units/Reference.html#header.boost.units.systems.abstract_hpp" title="Header &lt;boost/units/systems/abstract.hpp&gt;">boost/units/systems/abstract.hpp</a>&gt;

</span>
<span class="keyword">struct</span> <a class="link" href="base_unit_inf_idp110574880.html" title="Struct base_unit_info&lt;abstract::time_unit_tag&gt;">base_unit_info</a><span class="special">&lt;</span><span class="identifier">abstract</span><span class="special">::</span><span class="identifier">time_unit_tag</span><span class="special"