Rel is a database management system (DBMS) that implements Tutorial D.
Rel is a DBMS primarily intended for educational purposes, but also suitable as a desktop DBMS or lightweight server, that implements Date and Darwen's "Tutorial D" true relational database language.
Source code is available at https://github.com/DaveVoorhis/Rel
MighTyD is a prototype for demo puposes & the first implementation of the temporal database model devised by Nikos Lorentzos, Hugh Darwen & CJ Date. It uses Tutorial D as its language & PostgreSQL for storage & is compliant with the The Third Manifesto.
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