What is the importance of being Java EE compatible?
Java EE technology and its success is predicated on compatibility which brings Java technology’s mission of “Write Once, Run Anywhere” capability to the server. Developers can write applications to the Java EE specification — and companies can purchase such applications — and be assured that they are portable across all the Java Compatible, Enterprise Edition products available today. The list of Java EE-compatible applications servers may be found at http://java.sun.com/j2ee/compatibility.html.