The goal of the Apache Struts project is to encourage application architectures based on the "Model 2" approach, a variation of the classic Model-View-Controller (MVC) design paradigm. Under Model 2, a servlet (or equivalent) manages business logic execution, and presentation logic resides mainly in server pages.
The "struts-bean-el" tag library contains JSP custom tags useful in defining
new beans (in any desired scope) from a variety of possible sources, as well
as a tag to render a particular bean (or bean property) to the output
The "struts-logic-el" tag library contains tags that are useful in managing
conditional generation of output text, looping over object collections for
repetitive generation of output text, and application flow management.