tribute of a requirement element
  gives the name of the Boost.Build feature and the content of the
  requirement gives the value of that feature. A requirement such as
  <code class="computeroutput">&lt;includes&gt;foo.hpp</code> would be encoded as
  <code class="computeroutput">&lt;requirement
  name="includes"&gt;foo.hpp&lt;/requirement&gt;</code>.</p>
</div>
<div class="refsection">
<a name="id-1.4.3.7.40.5"></a><h2>Attributes</h2>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>