Emanuele Aliberti wrote:
  <group> looks like harmless, but i could not
find what it is for. 
It was (mostly) created for specifying common options for a collection
of entities. However, a tag specifically documented as a top-level tag
for xi:included files would be better to use for "readability" purposes.
  I put the HTML rendering of the rbuild reference on
line here
 
http://users.libero.it/ea/ros/rbuild/ for wider audience and peer review. 
Cool, thank you.
  After some <group>'ing, loading ReactOS.xml
in XXE 2.10 emits this
 error now:
 /project/xi:include:
 cannot load file "E:\src\ros\trunk\reactos\config.xml":
 E:\src\ros\trunk\reactos\config.xml (file not found)
 I don't know if it is wrong how we specify xi:fallback or if XXE is
 wrong. 
http://www.stylusstudio.com/w3c/xinclude/include_element.htm
http://www.stylusstudio.com/w3c/xinclude/fallback_element.htm#fallback_elem…
It looks like our use of xi:fallback is correct. Perhaps, though, the
problem is that we're not including a DTD for <xi:include>. I tried
doing that once, but the tools I had at hand couldn't get past first
base with external namespaces.