According to Head First Servlets, a simple tag can have a <body-content> of 'JSP', meaning scripting is allowed in the body (see page 472). However, on page 512 it says that a JspFragment CAN NOT have any scripting. This is confusing since getJspBody() returns a JspFragment representing the tag body. How can a JspFragment represent a body with scripting if it can't have any scripting? And can Simple and Classic tags have scripting?