The JavaServer Pages Standard Tag Library provides custom tags that encapsulate core functionality common to many web applications. JavaServer Pages Standard Tag Library has support for common, structural tasks such as iteration and conditionals. It provides tags for manipulating XML documents, internationalization tags, and SQL tags. It also provides a framework for integrating existing custom tags with JavaServer Pages Standard Tag Library tags.
Web Server supports JavaServer FacesTM technology. JavaServer Faces is a user interface framework for building web applications.
For information about these technologies, see: http://java.sun.com/j2ee/1.4/docs/tutorial/doc/index.html.