OGNL and ValueStack are two important areas based on which the new Struts 2 framework works. Understanding these concepts is important to work with Struts 2 Concept. OGNL is a separate opensource project and ValueStack is the concept from the Struts 2.
ValueStack is a wonderful concept with which the Struts 2 makes the model objects available to response UI pages without setting the objects in any attribute scopes.
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