Open source true relational database and query language conforming to the D standard by Date & Darwen (or Tutorial D).
- Latest version: 1.0.12 Beta October 26th 2014.
- Java version 5 or higher, SDK version highly recommended but not necessary if you do not intend to create new Java types or operators.
- Note that while the 1.0.12 Beta will work on Java 5 (and 6), the 1.0.12 Release will when it comes out only work on Java 7 or higher.
Links & publications
- Rel homepage on Sourceforge
- Rel forum
- Interview with Chris J. Date on the relational model - D and Rel get a mention.