12.1 Overview
Application Server version 11 and Developer version 11 support new Java EE 7 specifications such as Servlet 3.1 and WebSocket 1.0, which support Hitachi Application Framework and other companies' frameworks that require Java EE 7 specifications.
To support Java EE 7 specifications, some functionality in version 11 was changed, becoming incompatible with version 9 or earlier. This chapter describes the functionality that was changed and the migration method for migrating from version 9 to version 11.