NOTE from AD: Need a better title for this section. Something about removing constraints.

NOTE from AD: On 2008-04-09, I reworked this section in a major way in order to make the argumentation flow better. In the process, I left a lot of content which had originally been written by LPH or AD. I moved this content at the end of this page, so we won't loose it. We should see if we need/can re-thread some of it in the argumentation.

NOTE FROM AD: Need a good vocabulary to describe things. "linguistic variant" to refer to something like "The English version of page X". This is better than using "version" which is ambiguous (it could refer to something like v1.2 of the page versus v1.3 of the page). Also, I used the term "edit" instead of "content element". I think it more correctly describes what it is. We need to make sure we use the vocabulary consistently throughout the paper.

In this section, we describe how the CLWE system lifts all but one of the assumptions described in the Introduction. We illustrate this with a detailed usage scenario, and describe some of the implementation details of the change tracking backend which is the key element to supporting this scenario. But first, we need to define some simple notations which we will use to describe the scenario and the backend.