>Iterators</a>.</p>
<p>All MPL algorithms can be sorted into three
major categories: iteration algorithms, querying algorithms, and
transformation algorithms. The transformation algorithms introduce
an associated <a class="reference internal" href="./inserter.html">Inserter</a> concept, a rough equivalent for the notion of
<a class="reference external" href="http://www.sgi.com/tech/stl/OutputIterator.html" target="_top">Output Iterator</a> in the Standard Library. Moreover, every
transformation algorithm pr