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Contradicting statements

 
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From Mikalai's Study Guide chapter 2 - part 3

While referring to the @Resource annotation, it says:

The Bean Provider can specify that connections obtained from a resource manager connection factory reference are not shareable by specifying the value of the shareable annotation element to false or the res-sharing-scope deployment descriptor element to be Unshareable.



and later in the chapter it says:

A field or a method of a bean may be annotated with the Resource annotation to request injection of a resource environment reference. The authenticationType and shareable elements of the Resource annotation MUST NOT be specified; resource environment entries are NOT shareable and DO NOT require authentication.



Is this a mistake or some misunderstanding on my part?
 
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