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

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The history of data warehousing has all been about structured, repetitive, transaction-based data. That was yesterday. But when we look at the future data warehouse, we see the advent of unstructured textual data.

In most organizations there are two types of systems: unstructured and structured systems. Structured systems are those whose content is well ordered (that is, predictably ordered and organized). Everything is in neat, well ordered tables and columns. There are indexes. There are structured definitions. There are reports, and so forth. Structured data usually comes from transactions. As business transactions are executed, the data that is a byproduct of the transaction is gathered. Once the ...

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