 want to restrict its write access to the file system.
     We can do so by creating a sandbox component manager and evaluating
     the component through it.
  </P>

  <P>
    First, we have to create a suitable <tt>Policy</tt> structure.
    This can be accomplished simply by applying the appropriate functor from
    the <a href="policy.html"><tt>MkPolicy</tt></a> component:
  </P>
  <PRE class=code>
    structure Policy = MkReadOnlyPolicy()</PRE>
    
  <P>
    From this structure we create the sandbox m