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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
<html><head><title>GF Version 2.9</title></head>
<body bgcolor="#ffffff" text="#000000">
<center>
<img src="gf-logo.gif">
<h1>Grammatical Framework</h1>
<h2>Version 2.9</h2>
December 21, 2007.
<p>
</center>
<hr>
<a href=
"doc">Documentation</a>
|
<a href=
"download/">Download</a>
|
<a href=
"doc/darcs.html">LatestCode</a>
|
<a href=
"doc/gf-quickstart.html">QuickStart</a>
|
<a href=
"doc/gf-tutorial.html">Tutorial</a>
|
<a href=
"doc/gf-refman.html">ReferenceManual</a>
|
<a href="lib/resource/doc/synopsis.html">Libraries</a>
|
<a href=
"http://www.cs.chalmers.se/~bringert/gf/translate/">NumeralDemo</a>
|
<a href=
"http://www.cs.chalmers.se/~markus/gramlets/letter-applet.html">LetterDemo</a>
<hr>
<p>
</p><h2>News</h2>
<i>June 25, 2008</i>.
<a href="doc/gf3-release.html">GF 3.0</a>
coming soon! Version 2.9f is now frozen and no longer
available in darcs. But <a href="download/GF-2.9f.tgz">here</a> is a tarball
with the final version of 2.9 sources.
<p>
<i>March 20, 2008</i>. Ten years of GF!
<ul>
<li> <a href="doc/nancy-slides.pdf">The first public talk</a> at INRIA Nancy,
20 March 1998.
<li> <a href="doc/GF-0.1.tgz">GF Version 0.1</a> source code from XRCE Grenoble
18 March 1998 (Requires the
<a href="http://www.cs.chalmers.se/~augustss/hbc/hbc.html">HBC Haskell Compiler</a>
in "no-pedantic" mode).
</ul>
<p>
<i>December 21, 2007</i>.
<ul>
<li> GF 2.9 is mainly a bug fix version;
<li> preview version of GF3: get the
<a href=
"http://www.cs.chalmers.se/Cs/Research/Language-technology/darcs/GF/doc/darcs.html">
latest sources</a> and compile with <tt>make gfc</tt>
<li> new version of the <a href="doc/gf-tutorial.html">tutorial</a>
<li> new <a href="doc/gf-refman.html">reference manual</a>
<li> <a href="demos/resource-api/editor.html">resource api browser</a>
using interactive editing
</ul>
<p>
<a href="doc/old-news.html">News before 2.9</a>.
</p><h2>What is GF?</h2>
The Grammatical Framework (=GF) is a grammar formalism based on type
theory. It consists of
<ul>
<li> a special-purpose programming language
</li><li> a compiler of the language
</li><li> a generic grammar processor
</li></ul>
The compiler reads
GF grammars from user-provided files,
and the generic grammar processor performs
various tasks with the grammars:
<ul>
<li> generation
</li><li> parsing
</li><li> translation
</li><li> type checking
</li><li> computation
</li><li> paraphrasing
</li><li> random and exhaustive generation
</li><li> syntax editing
</li></ul>
GF particularly addresses four aspects of grammars:
<ul>
<li> multilinguality (parallel grammars for different languages)
</li><li> semantics (semantic conditions of well-formedness, semantic
properties of expressions)
<li> modularity and grammar engineering
<li> reuse of grammars in different formats and as software components
</ul>
GF provides an easy way to experiment with grammars written in
different formats, including the ubiquitous BNF and EBNF formats.
The <a href="doc/gf-compiler.png">GF compilation chart</a> gives a
summary of the supported input and output formats (the nodes in ellipses).
<br>
For instance, if you want to create a finite-state automaton
in the HTK SLF format (to use for speech recognition), all you have to do
is to write an EBNF grammar in a file <tt>foo.ebnf</tt> and type
<pre>
echo "pg -printer=slf" | gf foo.ebnf
</pre>
<h2>License</h2>
GF is open-source software licensed under
<a href="LICENSE">GNU General Public License (GPL)</a>.
<p>
The <a href="lib">GF Grammar Libraries</a> are licensed under
<a href="lib/resource/LICENSE">GNU Lesser General Public License (LGPL)</a>.
<h2>Examples and demos</h2>
<a href="http://www.cs.chalmers.se/~bringert/gf/translate/">Numeral
translator</a>: recognizes and generates
numbers from 1 to 999,999 in 80 languages.
(The link goes to a live applet, which requires
<a href="http://java.sun.com/j2se/1.5.0/download.jsp">Java 1.5 plugin</a>.
Here is an <a href="doc/2341.html">example</a>, which does
not require the plugin.)
<p>
<a href="http://www.cs.chalmers.se/%7Ekrijo/gramlets/letter-applet.html">Letter
editor</a>:
write simple letters in English, Finnish,
French, Swedish, and Russian with a few mouse clicks.
<p>
<a
href="http://www.cs.chalmers.se/~bringert/misc/tramdemo.avi">Demo film</a>
of a multimodal dialogue system built with embedded grammars.
<p>
<a href="examples/tutorial/">Example grammars</a> used in the
<a href="doc/gf-tutorial.html">GF tutorial</a>.
<p>
<a href="lib/resource/doc/index.html">Resource grammar library</a>:
basic structures of ten languages
(Danish, English, Finnish, French, German,
Italian, Norwegian, Russian, Spanish, Swedish).
Resource grammars can be used as libraries for writing GF
applications,
but they can also be useful for language training.
<h2>Executable programs</h2>
GF is available for
several platforms: Linux, Mac OS X, Microsoft Windows, and Sun OS.
To get GF, go to the
<a href="download">Download Page</a>.
<h2>Quick start</h2>
When you have downloaded and installed GF, you can try one of the
<a href="doc/gf-quickstart.html">quick start examples</a>.
<h2>Source code</h2>
The main part of GF is written in
<a href="http://www.haskell.org/">Haskell</a>.
<p>
The platform-independent graphical user interface is written in
<a href="http://java.sun.com/">Java</a>.
</p><p>
The <a href="download/">Download Page</a>
gives links to source and binary packages, as well as
information on compiler requirements.
<p>
The publicly accessible
<a href="http://www.cs.chalmers.se/Cs/Research/Language-technology/darcs/GF/doc/darcs.html">
Darcs repository</a>
has the latest sources and documents.
<p>
For Java programmers: GF grammars can be embedded in Java programs by using the
<a href="http://www.cs.chalmers.se/~bringert/gf/gf-java.html">
Embedded GF Interpreter</a>.
</p><h2>Documents</h2>
See the <a href="doc/index.html">Documentation page</a>.
<h2>Projects and events</h2>
<li> <a href="http://webalt.math.helsinki.fi/content/index_eng.html">WebALT</a>,
Web Advanced Learning Technologies. GF is used as for generating multilingual
teaching material in mathematics.
<li> <a href="http://www.talk-project.org">TALK</a> = Tools for Ambient Linguistic
Knowledge</a>. GF was used in implementing multimodal and multilingual dialogue systems.
<li> <a href="http://www.key-project.org/">KeY</a> project on Integrated Deductive
Software Design. GF was used for
authoring informal and formal specifications. More details on the GF
application
<a href="http://www.cs.chalmers.se/%7Ekrijo/gfspec">
here</a>.
<li>
Project <a href="http://efficient.citi.tudor.lu/index_noframe.html">Efficient</a>
at Tudor Institute, Luxembourg, "atelier de prototypage de transactions d'e-commerce".
GF is used as an authoring tool for business models.
<h2>Miscellaneous</h2>
</li><li>
<a href="doc/gfcc.pdf">
GFCC</a>:
report on a compiler from a fragment of C to JVM, written in GF.
The compiler source code can be found in the directory
<tt>examples/gfcc</tt> in the GF grammar library
(see <a href="http://sourceforge.net/project/showfiles.php?group_id=132285">GF download page</a>).
</li><li>
The original <a href="http://www.xrce.xerox.com/">
GF Xerox Home Page</a>
with the oldest releases of and documents on GF, up to Version 0.54, 1999,
does not seem to exist any more.
</li><li>
Earlier application:
<a href="http://www.cs.chalmers.se/%7Ehallgren/Alfa/Tutorial/GFplugin.html">
Natural-Language Interface to the proof editor Alfa</a>.
</li><li>
<a href="http://www.cs.chalmers.se/%7Emarkus/BNFC">The BNF Converter</a>.
A GF spin-off customized for the description of programming
languages.
</li><li>
<a href="http://www.cs.chalmers.se/%7Emarkus/FM">The Functional
Morphology project</a>. Creating infrastructure for GF and other
linguistic applications.
</li></ul>
<h2>Authors</h2>
The <a href="http://www.cs.chalmers.se/Cs/Research/Language-technology/">
Languge Technology Group</a>.
More details on the
<a href="http://www.cs.chalmers.se/%7Eaarne/GF/doc/gf-people.html">
Authors and Acknowledgements</a> page.
<h2>Implementation project</h2>
Want to become a GF developer? Contact
<a href="http://www.cs.chalmers.se/%7Eaarne/">Aarne Ranta</a>.
Or just get the sources and start hacking.
<p>
And register to the
<a href="https://lists.sourceforge.net/lists/listinfo/gf-tools-users">GF User's Mailing List</a>!
<hr>
Last modified by
<a href="http://www.cs.chalmers.se/%7Eaarne">
Aarne Ranta</a>,
December 21, 2007.
</body></html>
|
