How do I mix JSP and SSI #include?
If you're just including raw HTML, use the #include directive as usual inside your .jsp file.
But it's a little trickier if you want the server to evaluate
any JSP code that's inside the included file.
Ronel Sumibcay (ronel@LIVESOFTWARE.COM)
If your data.inc file contains jsp code you will have to use
<%@ vinclude="data.inc" %>