to runtime.  Several
components combine to provide support for dynamic property maps. The
<tt class="docutils literal"><span class="pre">dynamic_properties</span></tt> class collects a
group of heterogenous objects that model concepts from
the Boost Property Map library. Each property map is assigned a
string-based key when it is added to the collection, and it can be
addressed using that key.  Internally, <tt class="docutils literal"><span class="pre">dynamic_properties</span></tt> adapts
each contained pr