The Tag Library Directive
The jsp:taglib directive informs the JSP container that this page will be using a library of customized tags.
The most important attribute of the directive is uri.
The value of this directive is a URL referencing the Tag Library Descriptor file (TLD).
This is an XML document describing the syntax of the custom elements, and specifying where to find the associated tag handler classes.
The prefix attribute just specifies a prefix that will be appended to the tag names within this document.
- The prefix is not part of the library definition—it is simply a convenience to avoid name classes between tags used in a page.