type-safe, non-relational, multi-backend persistence; documentation

 This libraries allows Haskell applications to access a database or other data
 storage sytems in a type-safe, non-relational way.
 .
 This library provides just the general interface and helper functions.
 You must use a specific backend in order to make this useful.
 .
 This package provides the documentation for a library for the Haskell
 programming language.
 See http://www.haskell.org/ for more information on Haskell.