forked from GitHub/gf-core
338 lines
8.5 KiB
HTML
338 lines
8.5 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
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<html><head><title>GF Version 2.8</title></head>
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<body bgcolor="#ffffff" text="#000000">
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<center>
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<img src="gf-logo.gif">
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<h1>Grammatical Framework</h1>
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<h2>Version 2.8</h2>
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July 8, 2007.
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<p>
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</center>
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<hr>
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<a href=
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"doc">Documentation</a>
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<a href=
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"download.html">Download</a>
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<a href=
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"http://www.cs.chalmers.se/Cs/Research/Language-technology/darcs/GF/doc/darcs.html">Developers</a>
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<a href=
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"doc/gf-history.html">Changes</a>
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<a href=
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"doc/gf-quickstart.html">QuickStart</a>
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<a href=
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"doc/tutorial/gf-tutorial2.html">Tutorial</a>
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<a href=
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"lib">Libraries</a>
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<a href=
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"examples">Examples</a>
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<a href=
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"http://www.cs.chalmers.se/~bringert/gf/translate/">NumeralDemo</a>
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<a href=
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"http://www.cs.chalmers.se/~markus/gramlets/letter-applet.html">LetterDemo</a>
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<hr>
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<p>
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</p><h2>News</h2>
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<p>
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<i>August 31, 2007</i>. <a href="doc/gf-course.html">GF Graduate Course</a>
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organized by <a href="http://www.gslt.hum.gu.se">GSLT</a>: first module
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September 13-14 in Gothenburg.
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<p>
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<i>July 8, 2007</i>. GF 2.8 released. Some highlights:
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<ul>
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<li> Resource Grammar Library v 1.2: <a href="lib/resource-1.0/doc/synopsis.html">synopsis</a>.
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<li> New version of <a href="doc/tutorial/gf-tutorial2.html">tutorial</a>,
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now with exercises and also as a
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<a href="doc/tutorial/gf-tutorial2.pdf">pdf file</a>,
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<li> new speech formats
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<li> better semantics of <tt>variants</tt>
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<li> lots of bug fixes
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</ul>
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<p>
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<a href="doc/old-news.html">News before 2.7</a>.
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</p><h2>What is GF?</h2>
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The Grammatical Framework (=GF) is a grammar formalism based on type
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theory. It consists of
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<ul>
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<li> a special-purpose programming language
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</li><li> a compiler of the language
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</li><li> a generic grammar processor
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</li></ul>
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The compiler reads
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GF grammars from user-provided files,
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and the generic grammar processor performs
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various tasks with the grammars:
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<ul>
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<li> generation
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</li><li> parsing
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</li><li> translation
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</li><li> type checking
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</li><li> computation
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</li><li> paraphrasing
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</li><li> random and exhaustive generation
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</li><li> syntax editing
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</li></ul>
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GF particularly addresses four aspects of grammars:
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<ul>
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<li> multilinguality (parallel grammars for different languages)
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</li><li> semantics (semantic conditions of well-formedness, semantic
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properties of expressions)
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<li> modularity and grammar engineering
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<li> reuse of grammars in different formats and as software components
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</ul>
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GF provides an easy way to experiment with grammars written in
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different formats, including the ubiquitous BNF and EBNF formats.
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The <a href="doc/gf-compiler.png">GF compilation chart</a> gives a
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summary of the supported input and output formats (the nodes in ellipses).
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<br>
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For instance, if you want to create a finite-state automaton
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in the HTK SLF format (to use for speech recognition), all you have to do
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is to write an EBNF grammar in a file <tt>foo.ebnf</tt> and type
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<pre>
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echo "pg -printer=slf" | gf foo.ebnf
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</pre>
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<h2>License</h2>
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GF is open-source software licensed under
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<a href="LICENSE">GNU General Public License (GPL)</a>.
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<p>
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The <a href="lib>"GF Grammar Libraries</a> are licensed under
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<a href="lib/resource-1.0/LICENSE">GNU Lesser General Public License (LGPL)</a>.
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<h2>Examples and demos</h2>
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<a href="http://www.cs.chalmers.se/~bringert/gf/translate/">Numeral
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translator</a>: recognizes and generates
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numbers from 1 to 999,999 in 80 languages.
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(The link goes to a live applet, which requires
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<a href="http://java.sun.com/j2se/1.5.0/download.jsp">Java 1.5 plugin</a>.
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Here is an <a href="doc/2341.html">example</a>, which does
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not require the plugin.)
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<p>
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<a href="http://www.cs.chalmers.se/%7Ekrijo/gramlets/letter-applet.html">Letter
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editor</a>:
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write simple letters in English, Finnish,
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French, Swedish, and Russian with a few mouse clicks.
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<p>
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<a
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href="http://www.cs.chalmers.se/~bringert/misc/tramdemo.avi">Demo film</a>
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of a multimodal dialogue system built with embedded grammars.
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<p>
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<a href="lib/resource-1.0/doc/index.html">Resource grammar library</a>:
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basic structures of ten languages
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(Danish, English, Finnish, French, German,
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Italian, Norwegian, Russian, Spanish, Swedish).
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Resource grammars can be used as libraries for writing GF
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applications,
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but they can also be useful for language training.
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<h2>Executable programs</h2>
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GF is available for
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several platforms: Linux, Mac OS X, Microsoft Windows, and Sun OS.
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To get GF, go to the
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<a href="http://sourceforge.net/project/showfiles.php?group_id=132285">Download Page</a>
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(at SourceForge).
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<h2>Quick start</h2>
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When you have downloaded and installed GF, you can try one of the
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<a href="doc/gf-quickstart.html">quick start examples</a>.
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<h2>Source code</h2>
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The main part of GF is written in
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<a href="http://www.haskell.org/">Haskell</a>.
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<p>
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The platform-independent graphical user interface is written in
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<a href="http://java.sun.com/">Java</a>.
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</p><p>
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The <a href="http://sourceforge.net/project/showfiles.php?group_id=132285">
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Download Page</a> (at SourceForge) gives links to source and binary packages, as well as
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information on compiler requirements.
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<p>
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The publicly accessible
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<a href="http://www.cs.chalmers.se/Cs/Research/Language-technology/darcs/GF/doc/darcs.html">
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Darcs repository</a>
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has the latest sources and documents.
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<p>
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For Java programmers: GF grammars can be embedded in Java programs by using the
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<a href="http://www.cs.chalmers.se/~bringert/gf/gf-java.html">
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Embedded GF Interpreter</a>.
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</p><h2>Documents</h2>
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See the <a href="doc/index.html">Documentation page</a>.
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<h2>Projects and events</h2>
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<li> <a href="http://www.talk-project.org">TALK</a> = Tools for Ambient Linguistic
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Knowledge</a>. GF is used in implementing multimodal and multilingual dialogue systems.
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<li> <a href="http://www.key-project.org/">KeY</a> project on Integrated Deductive
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Software Design. GF is used for
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authoring informal and formal specifications. More details on the GF
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application
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<a href="http://www.cs.chalmers.se/%7Ekrijo/gfspec">
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here</a>.
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<li> <a href="http://webalt.math.helsinki.fi/content/index_eng.html">WebALT</a>,
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Web Advanced Learning Technologies. GF is used as for generating multilingual
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teaching material in mathematics.
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<li>
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Project <a href="http://efficient.citi.tudor.lu/index_noframe.html">Efficient</a>
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at Tudor Institute, Luxembourg, "atelier de prototypage de transactions d'e-commerce".
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GF is used as an authoring tool for business models.
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<li>
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An introductory course on GF was given at the
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<a href="http://www.logic.at/esslli03/">ESSLLI summer school</a>
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in Vienna 2003.
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<h2>Miscellaneous</h2>
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</li><li>
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<a href="http://www.cs.chalmers.se/%7Ekrijo/gramlets/index.html">Gramlets</a>:
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GF grammars compiled to Java applets.
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</li><li>
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<a href="doc/gfcc.pdf">
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GFCC</a>:
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report on a compiler from a fragment of C to JVM, written in GF.
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The compiler source code can be found in the directory
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<tt>examples/gfcc</tt> in the GF grammar library
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(see <a href="http://sourceforge.net/project/showfiles.php?group_id=132285">GF download page</a>).
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</li><li>
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<a href="http://www.cs.chalmers.se/~aarne/GF1">
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An early version of the GF Home Page</a>
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last updated for GF, Version 1.2, 2003.
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</li><li>
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The original <a href="http://www.xrce.xerox.com/">
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GF Xerox Home Page</a>
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with the oldest releases of and documents on GF, up to Version 0.54, 1999,
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does not seem to exist any more.
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</li><li>
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Earlier application:
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<a href="http://www.cs.chalmers.se/%7Ehallgren/Alfa/Tutorial/GFplugin.html">
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Natural-Language Interface to the proof editor Alfa</a>.
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</li><li>
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<a href="http://www.cs.chalmers.se/%7Emarkus/BNFC">The BNF Converter</a>.
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A GF spin-off customized for the description of programming
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languages.
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</li><li>
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<a href="http://www.cs.chalmers.se/%7Emarkus/FM">The Functional
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Morphology project</a>. Creating infrastructure for GF and other
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linguistic applications.
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</li></ul>
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<h2>Authors</h2>
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The <a href="http://www.cs.chalmers.se/Cs/Research/Language-technology/">
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Languge Technology Group</a>.
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More details on the
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<a href="http://www.cs.chalmers.se/%7Eaarne/GF/doc/gf-people.html">
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Authors and Acknowledgements</a> page.
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<h2>Implementation project</h2>
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Want to become a GF developer? Contact
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<a href="http://www.cs.chalmers.se/%7Eaarne/">Aarne Ranta</a>.
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Or just get the sources and start hacking.
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<p>
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And register to the
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<a href="https://lists.sourceforge.net/lists/listinfo/gf-tools-users">GF User's Mailing List</a>!
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<hr>
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Last modified by
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<a href="http://www.cs.chalmers.se/%7Eaarne">
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Aarne Ranta</a>,
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December 22, 2005.
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</body></html>
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