http://www.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5.2/html/Virtualization/sect-Virtualization-THow_To_troubleshoot_Red_Hat_Virtualization-SELinux_Considerations.html Reference is made to the boolean parameter xend_disable_trans, but it is not used in the example (xend_disable_t is used).
Fixed. See linked section in docbot for updated version.