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GF Logo

Grammatical Framework (GF)

The Grammatical Framework is a grammar formalism based on type theory. It consists of:

  • a special-purpose programming language
  • a compiler of the language
  • a generic grammar processor

The compiler reads GF grammars from user-provided files, and the generic grammar processor performs various tasks with the grammars:

  • generation
  • parsing
  • translation
  • type checking
  • computation
  • paraphrasing
  • random generation
  • syntax editing

GF particularly addresses four aspects of grammars:

  • multilinguality (parallel grammars for different languages)
  • semantics (semantic conditions of well-formedness, semantic properties of expressions)
  • grammar engineering (modularity, abstractions, libraries)
  • embeddability in programs written in other languages (C, C++, Haskell, Java, JavaScript)

Compilation and installation

The simplest way of installing GF is with the command:

cabal install

For more details, see the download page and developers manual.

About this repository

On 2018-07-25, the monolithic GF repository was split in two:

  1. gf-core — the GF compiler, shell and runtimes
  2. gf-rgl — the resource grammar library

The former repository is now archived and no longer updated. The split was performed using this script and the output of that script is here.