xilinx/common/primitives/common_slice/common_slice.model.xml

<models xmlns:xi="http://www.w3.org/2001/XInclude">
  <model name="CE_VCC">
    <output_ports>
      <port name="VCC" />
    </output_ports>
  </model>
  <model name="SR_GND">
    <output_ports>
      <port name="GND" />
    </output_ports>
  </model>
  <xi:include href="carry/carry4_vpr.model.xml"    xpointer="xpointer(models/child::node())" />
  <xi:include href="carry/carry_cout_plug.model.xml"    xpointer="xpointer(models/child::node())" />
  <xi:include href="../ff/ff.model.xml"            xpointer="xpointer(models/child::node())" />
</models>