The Third Manifesto[0] is 27 years old at this point. If it were possible to take seriously the proposition that SQL and relational algebra over databases were

The Third Manifesto[0] is 27 years old at this point. If it were possible to take seriously the proposition that SQL and relational algebra over databases were equivalent before its publication, it hasn't been since. [0]: https://en.wikipedia.org/wiki/The_Third_Manifesto https://en.wikipedia.org/wiki/The_Third_Manifesto I've been trying to get my hands on a corpus of Dataphor code, because Tutorial D is unsatisfactory for different reasons than SQL. What I've been able to glean of Dataphor is quite promising, but it isn't much.