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Building the Unstructured Data Warehouse: Architecture, Analysis, and Design by Krish Krishnan, W. H. Inmon

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The first major challenge to reducing unstructured data into a usable and analyzable form is the problem of the volume of unstructured data that accumulates. Organizations decide to hold emails for a long period of time. They hold contracts well past their expiration date and medical records for years and years. For a variety of legal and technical reasons, organizations hold unstructured data for a long time.

Unstructured data, itself, is inherently bulky to begin with, but when unstructured data is held for a lengthy amount of time, the sheer volume of data increases dramatically. There are many studies that reveal the existing large volume of unstructured data in many of our organizations, as well as the alarming growth rate of unstructured ...

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