what is the diffrence between TLD and tag file

hello i am confused,what is a tag file and what is a TLD file.
for custom tags do you need TLD file also?

A TLD (Tag Library Descriptor) is a file which allows you to assemble some custom tags in one library, identified by a uri. Custom tags can be either .class files compiled from Java sources (Classic and Simple tags), or Tag Files, whose extension is .tag or .tagx. For Classic and Simple tags, you need to use a TLD to declare them, to be able to use them in your JSPs. On the contrary, Tag Files do not need a TLD (unless packages in a JAR file), because the container will detect them automatically.

What book are you using ?

very thanks,i am using HeadFirst.thanks for the clarification.

Christophe, who do i petition to become a rancher?

Originally posted by Christophe Verre:
A TLD (Tag Library Descriptor) is a file which allows you to assemble some custom tags in one library, identified by a uri. Custom tags can be either .class files compiled from Java sources (Classic and Simple tags), or Tag Files, whose extension is .tag or .tagx. For Classic and Simple tags, you need to use a TLD to declare them, to be able to use them in your JSPs. On the contrary, Tag Files do not need a TLD (unless packages in a JAR file), because the container will detect them automatically.

What book are you using ?

If you are referring to the saloon title, please read this FAQ.