SELinux/Language

SELinux has a very extensive language in which policies and SELinux enforcement behavior can be defined and controlled.

Resources

 * Official SELinux project wiki which contains detailed information about SELinux policy statements
 * SELinux Notebook - The Foundations, an excellent resource for SELinux policy language and constructs which is periodically released updated in a new edition (at the time of this writing, the 4th edition is the most current one)