private.xml

<?xml version="1.0"?>
<root>
  <symbol_map type="KeyCode" name="META_L" value="0xff" />
  <devicevendordef>
    <vendorname>OCTI</vendorname>
    <vendorid>0x0b39</vendorid>
  </devicevendordef>
  <deviceproductdef>
    <productname>OCTI_PS2_TO_USB</productname>
    <productid>0x0001</productid>
  </deviceproductdef>
  <item>
    <name>First HHKB Hack</name>
    <identifier>private.sumikawa_HHKB_METAtoCOMMAND</identifier>
    <device_only>DeviceVendor::OCTI,DeviceProduct::OCTI_PS2_TO_USB</device_only>
    <autogen>--KeyToKey-- KeyCode::META_L, KeyCode::COMMAND_L</autogen>
  </item>
 </root>