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.. i18n: :ref:`Hierarchy <hierarchy-link>` is the arrangements of objects, peoples etc .. in a ranked or some series. The hierarchy are the way of arranging the dimensions.
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.. i18n: It need the fact table.
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.. i18n: Lets take the Example of Products.
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.. i18n: We want our sales cube to work on the products. Means we want to see the products sold. We have divided the products in to the category. So we will make the Product Hierarchy to display products by categories.