j2ee-application .... what is this tag for???

Hi,
can anyone tell my why I should ever use this magic <j2ee-application....> Tag within the <security> Tag of a JNLP-File??? I never needed it and in my opinion nobody will ever need it....
So what is this tag for??? What can I achieve with it?
Thank you,
Sven Haiges

according to the book http://developer.java.sun.com/developer/Books/jnlp/
j2ee-appplication-client-permissions does the following:
When used with a trusted appliction (signed and explicitly accepted by the user), this subelement grants the below permissions:
java.awt.AWTPermision (access to system clipboard)
java.awt.AWTPermission (access to event queue)
java.awt.AWTPermission (show window without warning banner)
java.lang.RuntimePermission (allow exit of JVM)
java.lang.RuntimePerimission (allow load library)
java.lang.RuntimePermission (allow queue of print job)
java.net.Socket.Permission (allow socket connectins)
java.io.FilePermission (allow read/write files)
java.io.Property permission (allow read properties)

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