stk.pop();
            stk.pop();
        });
        root.map(Activation::getOs).ifPresent(oa -> {
            stk.push(new ActivationFrame("os", Optional.of(oa)));
            stk.push(new ActivationFrame("arch", Optional.empty()));
            validator.accept(oa.getArch());
            stk.peek().location = "family";
            validator.accept(oa.getFamily());
            stk.peek().location = "name";

    <glob pattern="*.pfr"/>
  </mime-type>
  <mime-type type="application/h224"/>
  <mime-type type="application/http"/>
  <mime-type type="application/hyperstudio">
    <glob pattern="*.stk"/>
  </mime-type>
  <mime-type type="application/ibe-key-request+xml"/>
  <mime-type type="application/ibe-pkg-reply+xml"/>
  <mime-type type="application/ibe-pp-data"/>
  <mime-type type="application/iges"/>