I understand that FoundationDB's main point of differentiation from other NoSQL document DBs was support for transactional integrity across documents. Others (i

I understand that FoundationDB's main point of differentiation from other NoSQL document DBs was support for transactional integrity across documents. Others (i.e. all open-source options, AFAIK) support atomic transactions only on a single document. Sounds like the author had been told this, didn't quite get it, and mumbled this stuff instead.