My KeyRemap4MacBook's private.xml for Topre RealForce 87U and RubyMine.

private.xml

<?xml version="1.0"?>
<root>
  <devicevendordef>
    <vendorname>TopreCorporation</vendorname>
    <vendorid>0x0853</vendorid>
  </devicevendordef>
  
  <appdef>
    <appname>RubyMine</appname>
    <equal>com.jetbrains.rubymine</equal>
  </appdef>
 
  <item>
    <name>For Topre Keyboards</name>

    <item>
      <name>Set Command to Option</name>
      <appendix>RealForceのWindowsキー(Commandキー)をMacのOption/Altキーに置き換える</appendix>
      <identifier>private.topre.set_command_to_option</identifier>
      <device_only>DeviceVendor::TopreCorporation</device_only>
      <autogen>__KeyToKey__ KeyCode::COMMAND_L, KeyCode::OPTION_L</autogen>
      <autogen>__KeyToKey__ KeyCode::COMMAND_R, KeyCode::OPTION_R</autogen>
    </item>
    
    <item>
      <name>Set Option to Command and EISUU/KANA</name>
      <appendix>RealForceのAltキー(Optionキー)をMacのCommandキーに置き換える (空打ち時は英数/かな切替)</appendix>
      <identifier>private.topre.set_option_to_command_and_eisuu_kana</identifier>
      <device_only>DeviceVendor::TopreCorporation</device_only>
      <autogen>__KeyOverlaidModifier__ KeyCode::OPTION_L, KeyCode::COMMAND_L, KeyCode::JIS_EISUU</autogen>
      <autogen>__KeyOverlaidModifier__ KeyCode::OPTION_R, KeyCode::COMMAND_R, KeyCode::JIS_KANA</autogen>
    </item>
    
    <item>
      <name>Set Function to Special Feature (Except for RubyMine)</name>
      <appendix>RealForceのF1-F12キーにMacの画面の輝度調整機能等を割り当てる (ただしRubyMine以外)</appendix>
      <identifier>private.topre.set_function_to_special_feature</identifier>
      <device_only>DeviceVendor::TopreCorporation</device_only>
      <not>RubyMine</not>
      <autogen>--KeyToConsumer-- KeyCode::F1, ConsumerKeyCode::BRIGHTNESS_DOWN</autogen>
      <autogen>--KeyToConsumer-- KeyCode::F2, ConsumerKeyCode::BRIGHTNESS_UP</autogen>
      <autogen>--KeyToKey-- KeyCode::F3, KeyCode::MISSION_CONTROL</autogen>
      <autogen>--KeyToKey-- KeyCode::F4, KeyCode::LAUNCHPAD</autogen>
      <autogen>--KeyToConsumer-- KeyCode::F5, ConsumerKeyCode::KEYBOARDLIGHT_LOW</autogen>
      <autogen>--KeyToConsumer-- KeyCode::F6, ConsumerKeyCode::KEYBOARDLIGHT_HIGH</autogen>
      <autogen>--KeyToConsumer-- KeyCode::F7, ConsumerKeyCode::MUSIC_PREV</autogen>
      <autogen>--KeyToConsumer-- KeyCode::F8, ConsumerKeyCode::MUSIC_PLAY</autogen>
      <autogen>--KeyToConsumer-- KeyCode::F9, ConsumerKeyCode::MUSIC_NEXT</autogen>
      <autogen>--KeyToConsumer-- KeyCode::F10, ConsumerKeyCode::VOLUME_MUTE</autogen>
      <autogen>--KeyToConsumer-- KeyCode::F11, ConsumerKeyCode::VOLUME_DOWN</autogen>
      <autogen>--KeyToConsumer-- KeyCode::F12, ConsumerKeyCode::VOLUME_UP</autogen>
    </item>
  </item>
</root>