This document contains an overview of the modifications for Tamino XML Server 9.12 since the previous releases (Tamino XML Server 9.7 on Windows or Linux and XML Server 9.5 on AIX, HP-UX or Solaris). If you have an existing Tamino installation, please refer also to the Migration Guide for information about migration from your current system to Tamino 9.12. The readme.txt file may also contain information that you should be aware of before you use Tamino 9.12.