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In information retrieval, an index term (also known as subject term, subject heading, descriptor, or keyword) is a term that captures the essence of the topic of a document. Index terms make up a controlled vocabulary for use in bibliographic records .
LC Subject Headings are an integral part of bibliographic control, which is the function by which libraries collect, organize, and disseminate documents. It was first published in 1898, a year after the publication of Library of Congress Classification (1897). The last print edition was published in 2016.
Contents: A bulleted list, usually ordered chronologically, of the works created by the subject of the article. Heading names: Many different headings are used, depending on the subject matter. "Works" is preferred when the list includes items that are not written publications (e.g. music, films, paintings, choreography, or architectural ...
A user may want a document about a subject, which is different from the one intended by its author. From the point of view of information systems, the subject of a document is related to the questions that the document can answer for the users (cf. the distinction between a content oriented and a request-oriented approach).
Subject indexing is the act of describing or classifying a document by index terms, keywords, or other symbols in order to indicate what different documents are about, to summarize their contents or to increase findability. In other words, it is about identifying and describing the subject of documents. Indexes are constructed, separately, on ...
An index (pl.: usually indexes, more rarely indices) is a list of words or phrases ('headings') and associated pointers ('locators') to where useful material relating to that heading can be found in a document or collection of documents. Examples are an index in the back matter of a book and an index that serves as a library catalog.
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Topic outlines list the subtopics of a subject, arranged in levels, and while they can be used to plan a composition, they are most often used as a summary, such as in the form of a table of contents or the topic list in a college course's syllabus. Outlines are further differentiated by the index prefixing used, or lack thereof.
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