The subject indexes deal with two questions, what is a picture "about" and what is the picture "of". In many ways, subjects and objects in images are a continuum. The term animals is both a subject and object in many cases. An image of Yankee Stadium is "about" Sports because the picture is "of" a sports facility. While it is important to make the "of" and "about" distinctions, it is impossible to deny the direct associations the terms have with each other. This intellectual division allows the user to pinpoint his or her searches from the general to the very specific. When Barewalls have many pictures "about" or "of" something, they make a guide to that material. As a result, the Barewalls subject indexes group images that have either a common themes or similar types of objects.
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