Try #1 to create an "empty" rule.
[xorg/xkeyboard-config] / rules / base.m_k.part
1   amiga         =       amiga(de)
2   ataritt       =       ataritt(de)
3   empty         =       empty
4   sun4          =       sun(type4_euro)
5   sun5          =       sun(type5_euro)
6   sun6          =       sun(type6_usb)
7   sun6euro      =       sun(type6tuv_usb)
8   pc98          =       xfree98(pc98)
9   evdev         =       evdev
10  $nokiamodels   =       evdev
11   olpc          =       evdev
12   macintosh_hhk =       macintosh(hhk)
13   macintosh_old =       macintosh(old)
14  $macs          =       macintosh
15   thinkpadz60   =       xfree86(thinkpadz60)
16   *             =       xfree86