SortedEntityClass

SortedEntityClass[class,prop] represents an entity class derived from class by sorting according to the values of the property prop. 

SortedEntityClass[class,prop->"order"] sorts according to prop in the order specified.

SortedEntityClass[class,{prop1,prop2,…}] breaks ties by successively using the values of the property specifications propi.

SortedEntityClass[class,sortspec,n] represents the first n entities of class when sorted by sortspec.

SortedEntityClass[class,sortspec,{m,n}] represents the entities m through n of class when sorted by sortspec.

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