I'm curious whether it's possible to use dotted names as lvalues in
JSTL tags.

For example, I can increment a session counter like this:

<c:set var="count" scope="session" value="${sessionScope.count + 1}" />

But this appears not to be equivalent:

<c:set var="sessionScope.count" value="${sessionScope.count + 1}" />

 From that, I infer that dot notation works only within ${...} ?

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