XML Serialization

[GoogleCodeExporter]

Since google code does not seam to support feature requests, I have to create 
an issue. I hope this is the right way to do it.

For a project I create an API and I use the serialization module extensively. I 
really like the way excludes and relations work. One of the things this api 
needs is XML support. What I would like to see is a serializer which works 
exactly like the current one, except it supports serializing to xml as well. 
Serializing to json is easy; there's not much room to discuss the format. XML 
is a bit harder, but I'm sure there will be a proper way to do it.

Original issue reported on code.google.com by cont...@roelkramer.nl on 4 May 2011 at 10:31