From: <glassfish_at_javadesktop.org>
Date: Wed, 19 Mar 2008 22:28:46 PST

Hi,

https://glassfish.dev.java.net/nonav/javaee5/docs/SJSASEEAG.pdf
https://glassfish.dev.java.net/downloads/quickstart/index.html

The first link which is the admin guide talks about the domain concept but the like below makes it more clear with a more clear graphical illustration. At least it did for me.

http://blogs.sun.com/bloggerkedar/entry/concept_of_a_glassfish_domain
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