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

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Another important type of index is the homographic index. As its name suggests, a homographic index is one where the homographs in the text are indexed. For example, as mentioned earlier, suppose the raw text has the value “ha” in the context of medical records. If the person writing the text were a cardiologist, the term “ha” is interpreted to mean “heart attack. If the person writing “ha” were a general practitioner, the term “ha” would be interpreted to mean “head ache”. If the person writing the term “ha” were an endocrinologist, then the term “ha” would be interpreted to mean “hepatitis A”.

When a homograph is recognized, its interpretation is indexed, thereby greatly aiding the analyst who will use the indexed data.

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