policy.html">policy</a></em> rules.
  </P>

  <P>
    Sandboxing relies on the fact that
    <A href="../pickling.html#semantics">resources</A> cannot be pickled.
    A component can acquire relevant capabalities solely by means of
    linking suitable <a href="index.html#system">system components</A>.
    In a sandbox, link requests to such components are redirected to
    safe wrappers that implement runtime tests to enforce the configured
    policy.
  </P>

  <P>
    <B>Note:</B> The sandboxing mechanis