added to illustrate the
various features of the object factory

<ul>
<li><tt>rf511_wsfactory_basic.C</tt> - Basic factory concepts
<li><tt>rf512_wsfactory_oper.C</tt> - Using operator p.d.f.s in the factory
<li><tt>rf513_wsfactory_tools.C</tt> - Advanced example using interfaced high level tools
</ul>

<p>A formal transaction model is used to commit composite objects into
the workspace. If an error is detected in the expression, no objects
will be committed to the workspace, thus leaving no 'partial builds'