Create html documents

Hello,
I would like to try out Mallard documentation for my project RedNotebook 
[1]. Opening example documentation [2] with "yelp path-to-dir" works 
fine, however I need the .page files to be converted to html since the 
project is multiplatform. In the quest to convert Mallard .page files to 
html, I tried running "gnome-doc-tool html index.page", but I keep 
getting the error message:

/usr/bin/gnome-doc-tool: 1: Bad substitution
file://:1: parser error : Document is empty
^
file://:1: parser error : Start tag expected, '<' not found

When I remove the .page extension and run "gnome-doc-tool html index", I 
get the message:

Unmatched element: page
Unmatched element: info
Unmatched element: credit
Unmatched element: name
Unmatched element: email
Unmatched element: license
Unmatched element: p
Unmatched element: link
Unmatched element: p
Unmatched element: title
Unmatched element: section
Unmatched element: title
Unmatched element: section
Unmatched element: title
Unmatched element: section
Unmatched element: title

$ gnome-doc-tool -V
gnome-doc-html (gnome-doc-utils) 0.20.0

I am working on Ubuntu 10.04 64-bit.

Any ideas what I am doing wrong?

cheers,
Jendrik


[1] http://rednotebook.sf.net
[2] 
http://bazaar.launchpad.net/~robert-ancell/simple-scan/trunk/files/head%3A/help/C/