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reference collection
A reference collection is a collection of objects maintained for the purpose of study and authentication. Reference collections are generally large undertakings maintained by institutions; instead of having a single representative of each object, they will typically have multiples, so as to illustrate variations and, sometimes, provide samples for comparisons. For human-created objects such as postage stamps or coins, a good reference collection will also include an assortment of (carefully labelled) fakes and forgeries.
Since the purpose is study rather than personal gratification or display, a reference collection values damaged objects as much as the pristine; in fact, organizations maintaining reference collections will encourage members to donate their damaged or poor-condition items to the collection.
In biology, reference collections, such as herbaria are an important sort of information about variations of populations within a species. They are also the repository of holotypes used as the official definition of species.
In philately, reference collections are critical to expertization, since the characteristics differentiating authentic stamps from reprints, fakes, and forgeries are often too subtle to be described verbally.
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抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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