be combined to create a complex subject statement.

Daniel Joudrey and Arlene Taylor describe faceted classification using an analogy: "If one thinks of each of the faces of a cut and polished diamond as a facet of the whole, one can picture a classification notation that has small notations standing for subparts of the whole topic, which are pieced together to create a complete classification notation."

Faceted classifications exhibit many of the same problems as classifications based on a hierarchy. In particular, some concepts

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