Type.Inheritance.and.Relational.Theory
Typeinheritanceisthatphenomenonaccordingtowhichwecansay,forexample,thateverysquareisalsoarectangle,andsopropertiesthatapplytorectanglesingeneralapplytosquaresinparticular.Inotherwords,squaresareasubtypeofrectangles,andrectanglesareasupertypeofsquares.Recognizingandactinguponsuch
下载地址
用户评论
