Dynamic documents are changing documents; they are not the same as dynamic HTML (DHTML). DHTML includes Cascading Style Sheets, Scripting languages (like JavaScript), and the Document Object Model (DOM). Here is an example of a dynamic HTML.
There are two types of dynamic documents:
This page is an example of client pull -- a new page will automatically be
displayed about 20 seconds after you start reading this page...
Check the source code to see how this is done!
Client pull is very handy if a Web page has moved to a new address and you want to give your viewer some notice.