In this chapter, you looked behind the curtain at the inner workings of the Struts tag libraries. You found that not only is understanding the inner workings of the tag libraries not difficult, it also gives you valuable insight into how the rest of Struts works.
I highly recommend that, after completing this chapter, you take some time to review other Struts tags directly in the Struts source code itself. Be sure to review the Java source code, the TLD file entries for the tag, and the tag usage as defined in the Struts documentation.
It is important that you learn how to figure out what a tag is doing if you have trouble using it. That knowledge will enable you to code and debug faster, and make maintaining your pages easier.