Intro
 
Lession 1
 
Lession 2
 
Lession 3
 
Lession 4
 
Lession 5
 
Lession 6
 
Lession 7
 
Lession 8
 
Lession 9
 
Lession 10
 
Lession 11
 
Lession 12
 
Lession 13
 
Lession 14
 
Lession 15
 
Lession 16
 
Lession 17
 
Lession 18
 
Lession 19
 
Contact
 
 

 
Home | Text version
 
Download swi-prolog | Download these scripts

Learn Definite Clause Grammars (DCG) with Toki Pona

Intro

With the Definite Clause Grammars (DCG) is it possible to describe a language. But this is not a simple thing because natural languages are not simple. DCG programs represent mostly only parts of a human language. My aim is to describe a complete language. This language has to be very simple because I am not a genius. For example Esperanto is not simple enough (for me ;-). I hope Toki Pona is simple enough for my aim. I write Prolog scripts to describe the grammar rules of every of Toki Pona lessons of my website.

DCG notation is syntactic sugar for normal definite clauses of Prolog. Prolog is an old programming language for artificial intelligence. Prolog is different to the most programming languages. You don't have to program the solution for a problem. You describe the situation and Prolog tries to find the solution. For Prolog it's better if you have not experiences in other programming languages. ;-)

Not every implementation of Prolog support DCG. I use the free SWI-Prolog. First you have to install swi-prolog.

For edit the source code you can use the atom editor with the prolog plugin. On MS Windows you can use the the swi-prolog editor also.

Download and decompress the scripts of this lessons.

Start swi-prolog in the directory where the scripts are (here in Ubuntu):

$ swipl
?-

Now you can load a script of these lessons. For example the Prolog script for lesson one:

?-['toki-pona-01.pro'].

Please see in the lesson how to use the commands of the scripts.

You can test some of my scripts without installing SWI-Prolog. Use Chromium browser and go to http://swish.swi-prolog.org. Click in the left window on "Program" and copy the cource code in the left window. In the bottom right you can type your query. For example the query to list all possible sentences with this grammar:

?- sentence(X,[]).

The button "Next" show the next possibility. This is the same as ";" in installed prolog.


The Prolog script of the first lesson in the browser.

Links

To Learn Prolog

To Learn DCG

Books

Downloads

Download swi-prolog | Download these scripts | My langugage Projects on Github

 


rowa.giso.de | contact | Berlin (Good Old Europe)
This unofficial fan site by Robert Warnke is based on the official Toki Pona book and website: tokipona.org