<p>As an example of how to create a concept checking class template, we
look at how to create the corresponding checks for the <a href=
- "http://www.sgi.com/tech/stl/InputIterator.html">InputIterator</a> concept.
+ "http://www.boost.org/sgi/stl/InputIterator.html">InputIterator</a> concept.
The complete definition is here:</p>
<pre>
template <class X>