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AIMA-Java Core Algorithms from the book Artificial Intelligence a Modern Approach 3rd Ed.

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package aima.core.probability;

import aima.core.probability.domain.Domain;

/**
 * Artificial Intelligence A Modern Approach (3rd Edition): page 486.

 * 

 * Variables in probability theory are called random variables and their names
 * begin with an uppercase letter. Every random variable has a domain - the set
 * of possible values it can take on.
 * 
 * @author Ciaran O'Reilly
 */
public interface RandomVariable {
	/**
	 * 
	 * @return the name used to uniquely identify this variable.
	 */
	String getName();

	/**
	 * 
	 * @return the Set of possible values the Random Variable can take on.
	 */
	Domain getDomain();
}