SUMMARY CHAPTER 4
Summary Chapter 4: DATABASES AND DATA WAREHOUSES 1. Structured, Unstructured, and Semi-Structured Information · structured information Facts and data that are reasonably ordered, or that can be broken down into component parts and organized into hierarchies. · unstructured information Information that has no inherent structure or order, and the parts can’t be easily linked together. · semi-structured information Information category that falls between structured and unstructured information. It includes facts and data that show at least some structure, such as web pages and documents, which bear creation dates, titles, and authors. Metadata: Data about data that clarifies the nature of the information. The Quality of Information Not all information has high quality, as anyone who surfs the net knows. Here are the most important characteristi...