Gentoo xproto # eix xproto
[I] x11-proto/dmxproto
     Available versions:  2.2.2
     Installed versions:  2.2.2(01:17:41 04/20/07)(-debug)
     Homepage:            http://xorg.freedesktop.org/
     Description:         X.Org DMX protocol headers

* x11-proto/xproto
     Available versions:  7.0.5 7.0.7 (~)7.0.9 (~)7.0.10
     Homepage:            http://xorg.freedesktop.org/
     Description:         X.Org xproto protocol headers

[U] x11-libs/libX11
     Available versions:  1.0.1-r1 1.0.3 ~1.0.3-r1 ~1.0.3-r2 [M]~1.0.99.2-r1 ~1.1.1 1.1.1-r1
     Installed versions:  1.0.1-r1(20:23:01 04/19/07)(-debug ipv6)
     Homepage:            http://xorg.freedesktop.org/
     Description:         X.Org X11 library