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

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Another ubiquitous form of unstructured data is the spreadsheet. Spreadsheets are everywhere. Spreadsheets are the ultimate in personally controlled and personally managed data. There is much pithy information that can be found on spreadsheets, but there are some limitations that you need to be aware of. The first problem is that a cell of data in a spreadsheet is entirely dependent on the spreadsheet for its context and meaning. Looking at a cell and nothing but the cell tells you almost nothing. In order to understand what a cell means, you need to understand what the column in the spreadsheet represents and, for calculated data, the formula behind the cell.

A second limitation of a spreadsheet is that, for the most part, spreadsheets ...

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