/**
   Relatable interface
*/

public interface Relatable
{
   /*****************************************
    * Determines if this GradedActivity has the 
	* same score as other.
	*
	* @return true if the scores are the same, 
	*         otherwise false
	*****************************************/
   boolean equals(GradedActivity other);
   
    /*****************************************
    * Determines if this GradedActivity has a 
	* greater score than other.
	*
	* @return true if this score is greater, 
	*         otherwise false
	*****************************************/
   boolean isGreater(GradedActivity other);
   
   /*****************************************
    * Determines if this GradedActivity has a 
	* lower score than other.
	*
	* @return true if this score is less, 
	*         otherwise false
	*****************************************/
   boolean isLess(GradedActivity other);
}
