========================================================================
The grammar Świgra and the parser Birnam

version 1.00rc5, September 20, 2007
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The programme Świgra is an implementation of a formal grammar of
Polish presented by prof Marek Świdziński in his book "Gramatyka
formalna języka polskiego" (`Formal grammar of Polish', Warszawa
1992).

The grammar was implemented using the parser Birnam.  Birnam is 
bottom-up memorizing interpreter of DCG grammars.  It includes some
extensions necessary for Świdziński's grammar.

Not all files constituting Birnam and Świgra are available under the
same licence.  Please check the individual files for details.

Most of the files are available under the GNU General Public License
(see the file gpl.txt).  However due to the lack of a morphological
analyser for Polish under a GPL compatible licence, as a special
exception, the copyright holder gives permission to link the code of
Birnam and Świgra with the Morfeusz library (see
http://nlp.ipipan.waw.pl/~wolinski/morfeusz), and distribute linked
combinations including the two.  The authors of modified versions of
the programs have the option of extending this permission to modified
versions or dropping it.

The files used with LaTeX to typeset parse trees are made available
under LaTeX Project Public License version 1.2, since standard modules
of LaTeX are not GPL compatible.

Some auxiliary files are put in the public domain for the sake of
simplicity - the author disclaims copyright to these files.  This
applies to the sample grammar for Birnam and the C code used to
interface Morfeusz with Prolog.

Please recognise the fact that the licence of Morfeusz limits possible
use of programs built with Morfeusz.



The programs Birnam and Świgra are a part of my PhD thesis written
under the supervision of Janusz S. Bień, currently from the Chair of
Formal Linguistics, Warsaw University.  The thesis was defended in the
Institute of Computer Science PAS in 2005.

The release of Świgra under GPL is possible thanks to the kind
permission of the following persons and institutions:

1. prof. Marek Świdziński, the author of the grammar used,

2. dr. hab. Janusz S. Bień, prof. UW, the leader of a ministry
   sponsored project 8T11C 00213 "Zestaw testów do weryfikacji i oceny
   analizatorów języka polskiego" (1997-1999) within which a prototype
   for Świgra was developed (named AS),

3. Institute of Computer Science Polish Academy of Sciences, my
   current employer.

I'd like to express my sincere gratitude for all the above-mentioned
parties.

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Marcin Woliński                                 <wolinski@ipipan.waw.pl>
Linguistic Engineering Group
Institute of Computer Science PAS

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