| http://www.w3.org/ns/prov#value | - For ease of illustration, the objects are illustrated as rectangles rather than as circles, with, the object name at the top of a rectangle, the frame below the object name and the methods below the frame Referring to FIG. 3, three object classes are illustrated for "salesperson, employee and person, where a salesperson is a kind of employee, which is a kind of person.
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