relation

A data structure representing Relations on Sets.

https://www.github.com/haskell-works/relation/

Latest on Hackage:

0.5.2.0@rev:2

This package is not currently in any snapshots. If you're interested in using it, we recommend adding it to Stackage Nightly. Doing so will make builds more reliable, and allow stackage.org to host generated Haddocks.

BSD-3-Clause licensed by Leonel Fonseca

Maintained by John Ky

A library to model relationships between two objects that are subclasses of Ord. We use a two Maps that allows fast searching either by the key element or the value element.