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LCSH is the world's most widely used subject vocabulary. [1] Despite LCSH's wide-ranging and comprehensive scope, libraries that deal with more specific types of collections or user communities may use other vocabularies; for example, many medical libraries in the United States use the National Library of Medicine's Medical Subject Headings (MeSH).
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 .
Most subject headings come with a short description or definition. See the MeSH description for diabetes type 2 as an example. [6] The explanatory text is written by the MeSH team based on their standard sources if not otherwise stated. References are mostly encyclopaedias and standard textbooks of the subject areas.
The following is a list of the codes for MeSH (Medical Subject Headings), a comprehensive controlled vocabulary for the purpose of indexing journal articles and books in the life sciences. It is a product of the United States National Library of Medicine (NLM).
Catalogers at the United States Library of Congress chose one form—"O'Brien, Flann, 1911–1966"—as the official heading. [20] The example contains all three elements of a valid authority record: the first heading O'Brien, Flann, 1911–1966 is the form of the name that the Library of Congress chose as authoritative. In theory, every record ...
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 ...
Used at the beginning of the subject when the subject of the email is the only text contained in the email. This prefix indicates to the reader that it is not necessary to open the email. E.g., "1L: WFH today" WFH – work from home. Used in the subject line or body of the email. NONB – Non-business. Used at the beginning of the subject when ...
The BISAC Subject Headings are a method to classify books that is geared towards bookstores. It is mainly used by the Northern American booktrade, and online sellers like Barnes & Noble, Amazon and Baker & Taylor. The Book Industry Study Group maintains the BISAC system. [1]