There are other resources available containing valuable information about the Linux audit framework:
There are several man pages installed along with the audit tools that provide valuable and very detailed information:
The Linux Audit daemon
The Linux Audit daemon configuration file
A utility to assist controlling the kernel's audit system
A program similar to strace
A tool to query audit daemon logs
A tool that produces summary reports of audit daemon logs
The audit event dispatcher configuration file
The home page of the Linux audit project. This site contains several specifications relating to different aspects of Linux audit as well as a short FAQ.
The audit package itself contains a README with basic design information and sample .rules files for different scenarios:
The official Web site of the Common Criteria project. Learn all about the Common Criteria security certification initiative and which role audit plays in this framework.