From: Savatage on
Also:
http://msdn.microsoft.com/en-us/library/dd338997.aspx
From: Savatage on
What's your definition of "road map".
If it's "ALL NAV TABLE RELATIONS WITH CONDITIONS AND FILTERS"

then click the link below & good luck!

http://dynamicsuser.net/blogs/kine/archive/2008/08/04/the-art-of-nav-big-picture-of-nav.aspx

Perhaps you have a more specific question.