One of the most important aspects of this structure is how to create URLs from it. A caller would need to know the structure's root out of band. Let's say that root is http://somewhere.live.com/somerootfeed/. In that case the root of this data structure would be URL addressable using http://somewhere.live.com/somerootfeed/com.live.livecontacts.LiveContacts. However anyone with a copy of this structure can reference any part of it at will. For example, if we wanted to address the PostalCode element inside of Location the URL would be http://somewhere.live.com/somerootfeed/com.live.livecontacts.LiveContacts/com.live.livecontacts.Contacts/com.live.livecontacts.Contact(69257004-966e-4ee1-8552-5564f17c7cad)/com.live.livecontacts.Locations/com.live.livecontacts.Location(1)/com.live.livecontacts.PostalCode.