Please quote your sources. Many people refuse to answer questions that are unsourced, and it is not uncommon for questions to be deleted if the source is not provided (especially in the cases where the same person posts many questions without ever listing a source).
Also, you shouldshow some effort. What answer(s) did you think were correct? What did you think was wrong? Why? It is only with this information that someone can start to provide you with help.
I think you have misunderstood the concept behind javaranch. It will help you to grow and learn only if will do some effort at your side. Java ranch will help you to clear the concept if you have any confusion, or help you to start up if you want to learn anything new.
This is quite simple question, if you read the HFSJ chapter 10 or last pages of Chapter 9. you will get the answer of this question. If you still find some difficulties then you can any time come to javaranch, people are here to clear your concept.
First you should know the difference between tag handler and tag files. if you see the tag handler and tag files there is one similarity: they both are invoked using <prefix:TAGGING>
Now there must be a tag library which help to decide jsp container which method or file to be invoked.
now in case of tag handler we provide a tld file. but in case of tag files we dont provide any thing..! so container has to generate it by its own. Rules doesn't change for tag files. we still need a kind of mapping.