forked from GitHub/gf-core
started new forthcoming web page
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aarne
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index-3.txt
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index-3.txt
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%!postproc(html): "#BECE" "<center>"
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%!postproc(html): "#ENCE" "</center>"
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%!postproc(html): "#BESMALL" "<font size=-1>"
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%!postproc(html): "#ENSMALL" "</font>"
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#BECE
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[doc/gf-logo.png]
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=Grammatical Framework=
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Version 3.0
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June 2008
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#ENCE
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``|`` [Demos demos/]
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``|`` [Download download]
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``|`` [Development download]
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``|`` [Events doc/events.html]
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``|`` [Libraries lib/]
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``|`` [People doc/gf-people.html]
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``|`` [Projects doc/projects.html]
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``|`` [Publications doc/gf-tutorial.html]
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``|`` [Reference doc/gf-refman.html]
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``|`` [Tutorial doc/gf-tutorial.html]
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``|``
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#BESMALL
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==News==
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27 June 2008: release of GF 3.0 and a new web page; the old web page is
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[here index-2.html].
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#ENSMALL
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==What is GF==
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GF, Grammatical Framework, is a programming language for
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**multilingual grammar applications**. It is
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- a **special-purpose language for grammars**, like YACC, Bison, Happy, BNFC
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- a **functional language**, like Haskell, Lisp, OCaml, Scheme, SML
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- a **natural language processing framework**, like LKB, XLE, Regulus
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- a **categorial grammar formalism**, like ACG, CCG
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- a **logical framework**, like Agda, Coq, Isabelle
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Don't worry if you don't know most of the references above - but if you do know at
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least one, it may help you to get a first idea of what GF is.
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==Applications==
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GF can be used for building
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- [text translators ]
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- [speech translators ]
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- [natural-language interfaces ]
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- [multilingual web pages ]
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- [multilingual authoring systems ]
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- [dialogue systems ]
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- [language training systems ]
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- [natural language resources ]
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==Availability==
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GF is **open-source**, licensed under [GPL ] (the program) and [LGPL ] (the libraries). It
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is available for
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- [Linux ]
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- [Mac OS X ]
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- [Windows ]
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- via compilation to [JavaScript ], almost any platform that has a web browser
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==Projects==
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GF was born in 1998 at Xerox Research Centre Europe, Grenoble in the project
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Multilingual Document Authoring. At Xerox, it was used for prototypes including
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- restaurant phrase book in 6 languages
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- database queries in 7 languages
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- alarm system instructions in 5 languages
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- medical drug descriptions in 2 languages
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Later projects using GF and involving third parties include, in chronological order,
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- GF-Alfa: natural language interface to formal proofs
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- GF-KeY: authoring and translation of software specifications
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- TALK: multilingual and multimodal spoken dialogue systems
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- WebALT: multilingual generation of mathematical exercises (commercial project)
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- MultiWiki: multilingual Wiki for restaurant reviews
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- SALDO: Swedish morphological dictionary based on tools developed for GF
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Academically, GF has been used in four [PhD theses ], and resulted in around
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fifty [scientific publications ].
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==Programming in GF==
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GF is easy to learn by following the [tutorial doc/gf-tutorial.html]. You can write your
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first translator in 15 minutes.
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GF has an interactive command interpreter, as well as a batch compiler. Grammars can be
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compiled to parser and translator code in many different formats. These components can
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then be embedded in applications written in other programming languages. The formats
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currently supported are:
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- Haskell
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- Java
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- JavaScript
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- Prolog
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- Speech recognition: HTK/ATK, Nuance, JSGF
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The GF programming language is high-level and advanced, featuring
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- static type checking
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- higher-order functions
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- dependent types
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- pattern matching with data constructors and regular expressions
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- module system with multiple inheritance and parametrized modules
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==Libraries==
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Libraries are at the heart of modern software engineering. In natural language
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applications, libraries are a way to cope with thousands of details involved in
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syntax, lexicon, and inflection. The [GF resource grammar library lib/] has
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support for an increasing number of languages, currently including
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- Arabic (partial)
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- Bulgarian
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- Catalan (partial)
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- Danish
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- English
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- Finnish
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- French
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- German
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- Hindi/Urdu (partial)
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- [Interlingua http://www.interlingua.com/]
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- Italian
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- Norwegian bokmål
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- Russian
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- Spanish
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- Swedish
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Adding a language to the resource library takes 3 to 9
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months - [contributions doc/projects.html]
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are welcome!
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