According to the javadocs, specifying required = true on an element wrapper should make the wrapper element required (minOccurs = 1) in the generated schema. This doesn't appear work in JAXB 2.1.3. Is it supposed to?
I guess that depends on how you look at it. The default value for minOccurs is always 1, so actually adding minOccurs="1" as an element attribute in the schema is really a no-op of sorts. Whether it is present or not wouldn't affect validation, for example.
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