What Does a Congressional Page Do?

Library of Congress Subject Headings

U.S. Library of Congress Title Sheet

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Library of Congress Subject Headings

LCSH issues microfilm, microfiche, computer tape and

The basic principle of the title method is adopted. General and specific words are selected as the title, and the consistency of indexing and the disclosure of relevance are emphasized.

The LCSH is composed of a main table, a sub-table and instructions for use. The main table of LCSH is a list of many headings and non-headings in alphabetical order. Its entry consists of the following parts:

(1) Title and non-title. The heading words in the headings are displayed in bold, including different types such as main headings and subheadings, followed by classification numbers, range notes, reference items, etc., which are the basis for subject indexing in the vocabulary. Non-headings should not be printed in bold type, and serve as a guide for finding official titles.

(2) Classification number. Approximately 40% of the titles are followed by the classification number of the corresponding Congressional Classification. These categories usually represent the most basic aspect consistent with the subject. When two or more corresponding Congressional classification numbers are included under a title, The subject is indicated after the classification number.

(3) Notes. It is mainly used to supplement the title and standardize the use method. Including explaining the meaning of the title, specifying the scope of use of the title when cataloging, indicating the boundary between it and the relevant title, and explaining the exact meaning of the ambiguous title.

(4) Reference item. Prior to 1986, only the anachronism and related relations of dietary headlines were referenced; starting from the LCSH flat film version in December 1986 and the 11th edition in 1988, reference items and symbols similar to the thesaurus were used to clearly distinguish Hierarchical relationships and related relationships make the relationship between words more clear, while retaining the original SA (See Also) used as a reference for revealing a group of related titles or indicating a method for finding related titles. Document units can establish specific references based on the indexing situation, so that various inter-word relations can be fully revealed. In addition, subdividing geography, headings are usually indicated by the phrase "May Subd Geog" after the title or subtitle.

(1) LCSH is compiled on the basis of the cataloging practice of the Library of Congress, and the title is fully documented, reflecting the theme of the cataloguing documents of the Library of Congress and collaborative cataloging units, which has greater practicality.

(2) It is the embodiment of the basic principle of the title method. It pays attention to the user's wording habits, chooses general and specific words as the title, and attaches importance to the consistency of indexing and the disclosure of relevance.

(3) Exploring a series of techniques and methods of thematic method indexing. The title set developed by it, the citation order of the composite title, and the method of indexing various types of documents are the reference basis for establishing various types of titles.

(4) The Cataloging Department of the Library of Congress is responsible for regularly revising and preparing supporting reference books such as the Manual to ensure consistency and standardization.

(5) The Library of Congress uses the title of LCSH on its printed catalogs, machine-readable catalogs, and Western books in its cataloging data, which greatly expands its influence and makes it the most widely used topic word in foreign countries. table.