Answer: Java ES 5 documentation is stored in the docs.sun.com repository as follows:
The Java ES system collection provides links to the manuals associated with the system-level Java ES tasks, including installation. You can view these manuals in either HTML or PDF format.
The Install task page on the Java ES hub provides links to the information needed to do Java ES installation. See Install tasks.
The Java ES component collection provides links to the documentation for the Java ES product components that can be selected by the Java ES installer. This listing also includes links to specialized collections, such as the Release Notes Collection and the Deployment Examples and Technical Notes Collection.