Concepts 
This section describes the basic concepts of the Java EE 5 technology:
Dependency Injection
Annotations
Enterprise JavaBeans 3.0
JavaServer Faces 1.2
Unified Expression Language
Servlet 2.5
JSP 2.1
More information: Java Enterprise Edition 5 Overview
Java Persistence API (JPA 1.0)
More information: Overview of the Java Persistence API