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			583 B
		
	
	
	
		
			Plaintext
		
	
	
	
	
	
			
		
		
	
	
			15 lines
		
	
	
		
			583 B
		
	
	
	
		
			Plaintext
		
	
	
	
	
	
=================================================================
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Logtalk - Object oriented extension to Prolog
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Release 2.27.1
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Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
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=================================================================
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To load this example and for sample queries, please see the SCRIPT file.
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In this example we have several types of polygons that can be concentric.
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This is represented by a concentric binary relation ensuring that whenever 
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a polygon is moved towards a new position, all polygons likewise concentric 
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are moved along with them.
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