isa rule concept from the Java knowledge base

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isa rule

subject fact

isa rule is a subtopic of Classes 2001-10-19 11:37:02.0
is a subtopic of Inheritance
is an instance of rule source: Object Oriented Software Engineering by Lethbridge and Laganière, 2001-10-19 11:37:02.0
states that class A can only be a valid subclass of class B if it makes sense, in English, to say, "an A is a B"

isa rule	is a subtopic of Classes
	is a subtopic of Inheritance
	is an instance of rule
	states that class A can only be a valid subclass of class B if it makes sense, in English, to say, "an A is a B"