To me the most interesting of these was the solution to collaborative editing in Google Docs.  Sadly the description provided is a helicopter view.  It appears to reference OT[1] and is suggestive of the event sourced pattern[2].  My interest is piqued; can anyone reference an in-depth publication&#x2F;paper on the D&amp;I of their &quot;collaboration engine&quot;?<p>[1] <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Operational_transformation" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Operational_transformation</a><p>[2] <a href="http:&#x2F;&#x2F;martinfowler.com&#x2F;eaaDev&#x2F;EventSourcing.html" rel="nofollow">http:&#x2F;&#x2F;martinfowler.com&#x2F;eaaDev&#x2F;EventSourcing.html</a>