_Debian_sid = DEBIAN_8_0
_Debian_jessie = DEBIAN_8_0
_Debian_wheezy = DEBIAN_7_0
_Debian_squeeze = DEBIAN_6_0
_Ubuntu_trusty = UBUNTU_14_04
_Ubuntu_raring = UBUNTU_13_04
_Ubuntu_quantal = UBUNTU_12_10
_Ubuntu_precise = UBUNTU_12_04
_Ubuntu_lucid = UBUNTU_10_04