I found a problem: my site has a page containing a contact form.
Because it uses HTML form elements, the contact form page uses an HTML
source file instead of xdocs.  The problem is that the "rev_id"
metadata property does not seem to be used with the contact form page.
The static HTML page that Forrest (Cocoon) generates does contain a
"rev_id" metadata property, but the property's value is blank.

Here is the relevant part of the HTML source for the contact form page:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd";>
<html>
 <head>
     <title>...</title>
     <meta name="rev_id" content="$Id$">
 </head>

I also tried with xdocs syntax for the "rev_id" property, but this did
not work either.

The xdocs syntax is:

<meta name="rev_id">$Id$</meta>

Can I use a metadata property with an HTML source file?  If yes, how?

Thanks,
Brolin