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concept indexing

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n. ~ The process of creating an ordered list of headings, using terms that may not be found in the text, with pointers to relevant portions in the material.

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Concept indexing draws headings from a controlled vocabulary, rather than relying on the terms found in the material that is indexed. Concept indexing is distinguished from extraction indexing, typically done by a computer, which relies exclusively on the terms found in the document. At one point, concept indexing was a manual process, requiring human judgment to link the headings to the ideas in the text. The process of assigning terms from a controlled vocabulary has been automated, with mixed success, by building rules of analysis that can assign headings on the basis of related terms in the text.