Relational Ètudes (re, for short) is an implementation of the relational model. Written in PHP, re can be considered a PHP Framework. Specifically, re tries to implement the ideas presented in the book "Databases, Types, and the Relational Model" (The Third Manifesto). As such, re is based on a rigorous scientific theory, and thus has wider applicability. For instance, from a Model-View-Controller (MVC) approach in software development, re can be considered as the "Model" component. It is even possible to implement your own MVC-type framework using re as its main foundation. re has a consistent and intuitive application programming interface (API). Relational operators are supported, thus, data/set manipulation is simplified. Applications using re will be easy to maintain and extend. Distributed data can be easily used. Business rules are cleanly implemented. It should be very easy to integrate re in your projects, since it is designed to be framework agnostic.