there is a good knowledge in this url:
http://www.w3.org/TR/xslt
there is a good book in this url:
http://www.corewebprogramming.com

You mean something like Cocoon? [http://cocoon.apache.org/]

No, i want a tool which user by that tool could generate XSL, of course tool should be web  base.

You can use Saxon http://saxon.sourceforge.net/
Message: 3
Date: Tue, 31 Jan 2006 13:31:23 -0000
From: "Hamed Shayan" <shayanchris@...>
Subject: XSLT Generator

Do u know any XSLT web  based generator?
Or even application  base.