Potentially, we debated using internal id's. The issue then becomes we dont have a globally unique id currently, so would need to code/make one. We also fix the

Potentially, we debated using internal id's. The issue then becomes we dont have a globally unique id currently, so would need to code/make one. We also fix the url's in our system when they are first set and they become immutable. XML, easy enough for us to do, so why not support it :) we just run it through a different serializer before outputting it. Seemed like a minor addition to keep the XML users happy...