Applications and Libraries. It is a framework which defines a common
interface for authors to more easily build their applications in a
portable way. The Haskell Cabal is meant to be a part of a larger
infrastructure for distributing, organizing, and cataloging Haskell
Libraries and Tools.
Specifically, the Cabal describes what a Haskell package is, how these
packages interact with the language, and what Haskell implementations
must to do to support packages. The Cabal also specifies some
infrastructure (code) that makes it easy for tool authors to build and
distribute conforming packages.
