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hallgren 0dbe9a6d50 Make the GF web site more mobile friendly 
Most of the pages on the GF web site have an exemplary simple design,
with just one column of text. This make them adapt exceptionally
well to screens of different sizes. In particular, they should be
easy to read even on smartphones.

However, smartphone browsers like Mobile Safari and the default
Android Browser assume that pages do *not* adapt well to small
screens, so by default they emulate a big screen, forcing the user
to zoom in to a part of the page to be able to read it. By adding
the meta tag

  <meta name = "viewport" content = "width = device-width">

the big screen emulation can be turned off, allowing pages to be
formatted to fit the actual screen size and text to be displayed
at a readable size.
2012-09-28 20:26:13 +00:00

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<!DOCTYPE html>
<HTML>
<HEAD>
<TITLE>GF - Grammatical Framework</TITLE>
<link rel=stylesheet href="css/style.css">
<meta name = "viewport" content = "width = device-width">
<script type="text/javascript">
function sitesearch() {
var q=document.forms[0].q.value;
var site=" site:www.grammaticalframework.org";
var search=encodeURIComponent(q+site)
document.location.href="http://www.google.com/search?q="+search
return false;
}
</script>
</HEAD>
<BODY>
<script type="text/javascript">
document.write('<div style="text-align: right"> <form onsubmit="return sitesearch()" method=get action="http://www.google.com/search"> <input type=search name="q" placeholder="site search"> <input type=submit value="Search"> </form></div>')
</script>
<div class=center>
<IMG SRC="doc/Logos/gf0.png" alt="">
<H1>Grammatical Framework</H1>
<P>
Version 3.3.3
<br>
March 2012
<P>
<div class=mainlinks style="font-size: 140%">
[ <A HREF="demos/index.html">Demos</A>
| <A HREF="http://www.grammaticalframework.org/download/index.html">Download</A>
| <A HREF="lib/doc/synopsis.html">Libraries</A>
| <A HREF="doc/gf-refman.html">Reference</A>
| <A HREF="doc/tutorial/gf-tutorial.html">Tutorial</A>
| <A HREF="doc/gf-quickstart.html">QuickStart</A>
| <A HREF="http://groups.google.com/group/gf-dev">UserGroup</A>
| <A HREF="gf-book">Book</A>
| <A HREF="https://github.com/GrammaticalFramework/GF/">GitHub</A><font size=-1 color=red><i>New!</i></font>
| <a href="http://cloud.grammaticalframework.org/"><img src="src/www/P/gf-cloud.png" alt="GF Cloud Service" title="GF Cloud Service"></a>
]
</div>
<div class=extralinks>
<p>
[ <a href="http://code.google.com/p/grammatical-framework/issues/list">Issues</a>
| <A HREF="http://code.google.com/p/grammatical-framework/wiki/SideBar?tm=6">Wiki</A>
| <A HREF="doc/gf-people.html">People</A>
| <A HREF="doc/gf-bibliography.html">Publications</A>
| <A HREF="doc/gf-reference.html">QuickRefCard</A>
| <A HREF="doc/gf-shell-reference.html">GF Shell Reference</A>
| <a href="doc/gf-editor-modes.html">GF Editor Modes</a>
| <a href="eclipse/index.html">GF Eclipse Plugin</a>
| <A HREF="doc/gf-lrec-2010.pdf">LibTutorial</A>
| <a href="http://hackage.haskell.org/packages/archive/gf/3.1.6.2/doc/html/PGF.html">PGF library API</a>
| <A HREF="http://www.molto-project.eu">MOLTO</A>
| <A HREF="http://school.grammaticalframework.org">SummerSchool</A>
| <A HREF="/android/">Android</A>
]
</div>
</div>
<H2>News</H2>
<div class=news2>
<dl>
<dt>2012-06-29: GF sources now mirrored in GitHub, with change
statistics and other browsing features.
See <a href="https://github.com/GrammaticalFramework/GF/"><tt>github.com/GrammaticalFramework/GF</tt></a>
<dt>2012-05-07: New resource grammar language: Japanese.
See <a href="lib/doc/synopsis.html">library synopsis</a>.
<dt>2012-03-23: There will be a
<a href="gf-tutorial-icfp-2012/">GF tutorial at ICFP 2012</a>
in Copenhagen.
<dt>2012-03-03: <strong>GF 3.3.3 released!</strong>
<a href="download/release-3.3.3.html">Release notes</a>.
<dt>2012-02-24: New resource grammar languages: Hindi, Sindhi.
See <a href="lib/doc/synopsis.html">library synopsis</a>.
<dt>2011-12-29: New resource grammar languages: Latvian, Thai.
See <a href="lib/doc/synopsis.html">library synopsis</a>.
<dt>2011-10-27: <strong>GF 3.3 released!</strong>
<a href="download/release-3.3.html">Release notes</a>.
<dt>2011-09-20: There is now a page collecting
<a href="doc/gf-editor-modes.html">editor modes for GF</a>.
Contributions are welcome!
<dt>2011-09-12: <strong>GF 3.2.9</strong> source snapshot with faster grammar compilation available. See <a href="download/index.html">Downloads</a>.
<dt>2011-04-22: <a href="android/tutorial/">JPGF Android Tutorial</a> added.
<dt>2011-04-15: The <a href="gf-book">GF Book</a> is available.
<dt>2011-01-13: <a href="http://www.molto-project.eu/node/1177">Phrasedroid
available on the Android Market</a>.
<dt>2011-01-04: GF is part of the
<a href="http://www.clt.gu.se/clt-toolkit">CLT Toolkit</a>.
<dt>2010-12-23: <strong>GF 3.2 released!</strong>
<a href="download/release-3.2.html">Release notes</a>.
<dt>2010-12-22:
<A HREF="http://school.grammaticalframework.org">GF Summer School</A>
in Barcelona, 15-26 August 2011.
</dl>
</div>
<H2>What is GF</H2>
<P>
GF, Grammatical Framework, is a programming language for
<B>multilingual grammar applications</B>. It is
</P>
<UL>
<LI>a <B>special-purpose language for grammars</B>, like YACC, Bison, Happy, BNFC,
but not restricted to programming languages
<LI>a <B>functional language</B>, like Haskell, Lisp, OCaml, Scheme, SML,
but specialized to grammar writing
<LI>a <B>natural language processing framework</B>, like LKB, XLE, Regulus,
but based on functional programming and type theory
<LI>a <B>categorial grammar formalism</B>, like ACG, CCG,
but different and equipped with different tools
<LI>a <B>logical framework</B>, like Agda, Coq, Isabelle,
but equipped with concrete syntax in addition to logic
</UL>
<P>
Don't worry if you don't know most of the references above - but if you do know at
least one, it may help you to get a first idea of what GF is.
</P>
<H2>Applications</H2>
<P>
GF can be used for building
</P>
<UL>
<LI><A HREF="http://grammaticalframework.org:41296">translation systems</A>
<LI><A HREF="http://grammaticalframework.org:41296/minibar/minibar.html">multilingual web gadgets</A>
<LI><A HREF="http://www.cs.chalmers.se/~hallgren/Alfa/Tutorial/GFplugin.html">natural-language interfaces</A>
<LI><A HREF="http://www.youtube.com/watch?v=1bfaYHWS6zU">dialogue systems</A>
<LI><A HREF="lib/doc/synopsis.html">natural language resources</A>
</UL>
<H2>Availability</H2>
<P>
GF is <B>open-source</B>, licensed under <A HREF="LICENSE">GPL</A> (the program) and
<A HREF="./LICENSE">LGPL</A> and <A HREF="./LICENSE">BSD</A> (the libraries). It
is available for
</P>
<UL>
<LI>Linux
<LI>Mac OS X
<LI>Windows
<li>Android mobile platform (via Java; runtime)
<LI>via compilation to JavaScript, almost any platform that has a web browser (runtime)
</UL>
<H2>Projects</H2>
<P>
GF was first created in 1998 at
<A HREF="http://www.xrce.xerox.com/">Xerox Research Centre Europe</A>,
Grenoble, in the project
Multilingual Document Authoring. At Xerox, it was used for prototypes including
a restaurant phrase book,
a database query system,
a formalization of an alarm system instructions with translations to 5 languages, and
an authoring system for medical drug descriptions.
</P>
<P>
Later projects using GF and involving third parties include, in chronological order,
</P>
<UL>
<LI><A HREF="http://www.cs.chalmers.se/~hallgren/Alfa/Tutorial/GFplugin.html">GF-Alfa</A>:
natural language interface to formal proofs
<LI><A HREF="http://efficient.citi.tudor.lu/index_noframe.html">Efficient</A>:
authoring tool for business models.
<LI><A HREF="http://www.key-project.org/">GF-KeY</A>:
authoring and translation of software specifications
<LI><A HREF="http://www.talk-project.org">TALK</A>:
multilingual and multimodal spoken dialogue systems
<LI><A HREF="http://webalt.math.helsinki.fi/">WebALT</A>:
multilingual generation of mathematical exercises (commercial project)
<LI><A HREF="http://spraakbanken.gu.se/sal/">SALDO</A>:
Swedish morphological dictionary based on rules developed for GF and
<A HREF="http://www.cse.chalmers.se/alumni/markus/FM/">Functional Morphology</A>
<LI><a href="http://www.molto-project.eu">MOLTO</a>:
multilingual online translation.
</UL>
<P>
Academically, GF has been used in four PhD theses and resulted in around
fifty scientific publications (see <A HREF="doc/gf-bibliography.html">GF publication list</A>).
</P>
<H2>Programming in GF</H2>
<P>
GF is easy to learn by following the <A HREF="doc/tutorial/gf-tutorial.html">tutorial</A>.
You can write your first translator in 15 minutes.
</P>
<P>
GF has an interactive command interpreter, as well as a batch compiler.
Grammars can be compiled to parser and translator code in many different
formats. These components can then be embedded in applications written
in other programming languages. The formats currently supported are:
</P>
<UL>
<LI>Haskell
<li>Java, in particular the Android platform
<LI>JavaScript
<LI>Speech recognition: HTK/ATK, Nuance, JSGF
</UL>
<P>
The GF programming language is high-level and advanced, featuring
</P>
<UL>
<LI>static type checking
<LI>higher-order functions
<LI>dependent types
<LI>pattern matching with data constructors and regular expressions
<LI>module system with multiple inheritance and parametrized modules
</UL>
<H2>Libraries</H2>
<P>
Libraries are at the heart of modern software engineering. In natural language
applications, libraries are a way to cope with thousands of details involved in
syntax, lexicon, and inflection. The
<A HREF="lib/doc/synopsis.html">GF resource grammar library</A> has
support for an increasing number of languages, currently including
</P>
<OL>
<LI>Amharic (partial)
<LI>Arabic (partial)
<LI>Bulgarian
<LI>Catalan
<LI>Danish
<LI>Dutch
<LI>English
<LI>Finnish
<LI>French
<LI>German
<LI>Hindi
<LI><A HREF="http://www.interlingua.com/">Interlingua</A>
<LI>Japanese
<LI>Italian
<LI>Latin (fragments)
<LI>Latvian
<LI>Nepali
<LI>Norwegian bokmål
<LI>Persian
<LI>Polish
<li>Punjabi
<LI>Romanian
<LI>Russian
<LI>Sindhi
<LI>Spanish
<LI>Swedish
<LI>Thai
<LI>Turkish (fragments)
<LI>Urdu
</OL>
<P>
Adding a language to the resource library takes 3 to 9
months - contributions
are welcome! You can start with the <A HREF="doc/gf-lrec-2010.pdf">resource grammarian's tutorial</A>.
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