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Indexing

  • William Hersh
Chapter
Part of the Health Informatics book series (HI)

In the first chapter, indexing was defined as the process of assigning metadata, consisting of terms and attributes, to documents. This process is also called tagging. There are two reasons to index document collections, one cognitive and one mechanical. The cognitive reason for indexing is to represent the content of individual documents so that searchers may retrieve them accurately. The mechanical reason for indexing is to enable computer programs to more rapidly determine which documents contain content described by specific terms and attributes.

In this chapter, we will explore the indexing process in more detail. After some introductory discussion, the two broad approaches to indexing, manual and automated, will be described. For manual indexing, approaches applied to bibliographic, full-text, and Web-based content will be presented. This will be followed by a description of automated approaches to indexing, with discussion limited to those used in operational retrieval systems....

Keywords

Resource Description Framework Control Vocabulary Unify Medical Language System Indexing Term Manual Indexing 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Copyright information

© Springer Science + Business Media, LLC 2009

Authors and Affiliations

  • William Hersh
    • 1
  1. 1.Department of Medical Informatics & Clinical EpidemiologyOregon Health & Science UniversityBICC PortlandUSA

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