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edited by Birger Hjørland and Claudio Gnoli
Library of Congress Subject Headings (LCSH)
1. IntroductionThe Library of Congress Subject Headings (LCSH) are a subject heading system produced by the Library of Congress (LC) in Washington, DC. It is a kind of controlled vocabulary and as such a → knowledge organization system (KOS). A subject heading system is an alphabetical list of terms used for indexing documents. It is different from a → thesaurus, which is also an alphabetical list of terms used for indexing documents. The main difference is that a subject heading system generally consists of pre-coordinated terms (mainly developed for printed catalogs), while a thesaurus generally consists of terms for post-coordinative searching (mainly developed for electronic databases). In Section 2, more information about LCSH in relation to thesauri is provided. LCSH is used around the world, as Olson (2000, p. 54) wrote: [I]n libraries and national bibliographies in much of the English-speaking world (e.g. Australia and the United Kingdom), in heterogeneous environments that are more or less officially English-speaking (e.g. Canada and South Africa), in countries with diverse languages that use English as a common language (e.g. Singapore and Nigeria), in countries that use English for its practical external value (e.g. Iceland), alongside translations of LCSH (e.g. in Turkey and Malaysia), and in translation alone (e.g. the Spanish versions which are widely used in Latin America). LCSH-derived lists of subject headings are used in some countries (e.g. Portugal) and in other types of subject access tools (e.g. indexes published by H. W. Wilson Company). Because of the huge use of LCSH, and because of its widespread inclusion in courses of → library and information science (LIS), and the many textbooks in which the system is described (including Broughton 2012, Chan 2005, Ganendran 2000, Snow 2021, Stone 2000, and Studwell 1990), the study of its quality is very important. 2. A brief history and description of LCSHIn this article, just a few points about the history of the LCSH are provided. For further information, see Miksa (1983). The following points in the development of LCSH can be emphasized:
In order to illustrate the structure of LCSH, table 1 shows the entry about information science from 44th ed. (Library of Congress. 2022). The first line states that it may be subdivided geographically and that this subject heading is classified in the group
LCSH is daily updated in the digital version available through Classification Web, and is adding approximately 4,000 headings each year. Libraries that participates the Subject Authority Cooperative Program may propose changes to LCSH. 3. Criticisms of LCSHThere have been much criticism of LCSH over the years. There have been three general review articles summarizing this critique: Cochrane and Kirtland (1981), Shubert (1992) and Fischer (2005). Delgado and Stefancic (1989) also summarize criticism of the system [2]. The specific studies can be divided into two main groups: (1) Those that present criticism about LCSH's presentation of minority groups, and (2) those presenting criticism of the system as such, including its lack of usefulness, logic, sound principles, and necessary subject knowledge. (1) Examples of studies criticizing how minorities or underrepresented groups are represented in LCSH include, among other, Adler (2017), Aman (1980), Berman (1971; 1984), Dobreski, Hardesty and Nolan (2021), Lo (2019), Olson (2001) and Snow and Moulaison-Sandy (2022). Such studies rightfully point toward ethical problems in classification and indexing systems. However, sometimes criticism of this kind is accompanied by an implicit assumption that LCSH is in general a valuable system, that although these kinds of biases are important, they are not jeopardizing the system (if this were the case there would be no reason to address such bias). Hjørland (2012, 308) wrote: Olson (2001) examined the way in which LCSH were used to index some books in the field of gender studies, and found the indexing to be problematic. For example, the concept of 'voice' (in relation to the views of a minority) is not represented in LCSH. According to Olson's interpretation, this may be due to poor indexing of marginalized topics (as opposed to mainstream topics). My interpretation is unfortunately more pessimistic: I believe that this poor indexing is due to a lack of subject knowledge. The terms and relations in LCSH in relation to this field (gender studies) seem to be speculative and far away from the points of view that the literature in the field tries to put forward. This probably does not only apply to the views of minorities, which seem to be poorly represented by LC, but constitutes a general tendency that will also affect majority views. (2) A range of criticisms has been raised concerning the lack of principles and quality in the LCSH.
A few studies examine how specific subjects are represented in LCSH:
Have there been defenses of LCSH, attempts to refute the criticism? To our knowledge, the Library of Congress itself has never done so. (One among other indications that the activities of LC are not research based?) Some others have defended LCSH, but in our opinion with extremely weak or strange arguments. Studwell (1990) intended his book to fill the lack of books about philosophical issues and theoretical principles of the LCSH and presented 32 "principles" relating to this system. However, it consists of 32 claims and the author's suggestions for improving the system rather than principles or philosophical and theoretical analyses on which the system is based. The first "principle" was (p. 11–12): "The Library of Congress subject heading system, though far from perfect, is a work of collective, cumulative, and increasing genius; it should not be discarded in favor of less-established and unproven alternatives". This quote does not state a principle on which LCSH is based. It just state an unsupported flattering. Studwell's view of LCSH as being a work of genius based on philosophical principles is in stark contrast to the views of other researchers. Delgado and Stefancic (1989), after having summarized criticisms of LCSH, wrote: Still, many staunchly defend the Library of Congress system [FN24] [3]. These defenders point out that the Library of Congress Subject Headings was never intended to be an all-inclusive set of categories. Rather, it was intended to enable the Library of Congress to deal with one single collection, its own [FN25]. Moreover, when the Library of Congress adopted the categories, they were adequate for the Library's then small collection. Most libraries, even those with specialized collections, chose to adopt the Library of Congress headings, and the Library maintained the essentials of the system even as the collection grew. As a result, the Library of Congress system extended far beyond the task for which it was originally designed [FN26]. Finally, defenders add that it is reasonable for the Library to take into account the cost of changes, especially when these changes will be multiplied at other libraries throughout the United States, and that the Library does add new categories when the need for them is shown [FN27]. Again, these are not arguments that LCSH are doing a good job. These are excuses for why the system is as it is. The last comment, that the Library does add new categories when the need for them is shown, is not demonstrated, just claimed — and in strong opposition to the findings of Furner and Hjørland (2023). 4. ConclusionInformation science with knowledge organization was institutionalized as a research field and an academic field of study about one hundred years ago. It is important that research influences practical information work (e.g., the design of controlled vocabularies). Hjørland (2023, Section 2) wrote: "For two reasons it is a problem if systems and processes used in practice are obsolete [or simply bad] from a research perspective: 1. it may imply that research-based education is less relevant for practice because practice ignore new systems not in use; 2. it may imply that education reflecting current practices may not have a proper academic level and may be less relevant for tackling new developments". We listed in the introduction no less than six textbooks devoted to the LCSH, which is just a little part of the huge number of articles and book chapters about this system used in courses in knowledge organization. The emphasis on LCSH is understandable given its huge availability in library databases. It is also, however, a problem that such a poor system is what the students learn about, especially if they learn that it is a system that is beneficial for the users. Markey and Knott (2023) is a textbook on online searching. Chapter 6 introduces CVs, including LCSH. In principle well and good. There is a danger, however, that students with this book learn that CVs are good and to be trusted, while they need to learn to be critical. One misses examples comparing different search strategies, including ones, in which — after the words of Larson (1991) — users should "reduce their use of the subject index [CV] and [...] increase their use of alternate means of subject access". Endnotes1. See Section 3 for a critical comment about the geographical subdivision. 2. Citing Dwyer (1986, 3) and Scott (1988, 64), Delgado and Stefancic (1989) concluded: "Impatience with the Library of Congress Subject Headings has led at least one other library system, that of Minnesota's Hennepin County, to produce its own subject heading list and make it available to other libraries. Hennepin's subject headings have been called both more current than Library of Congress Subject Headings and more sensitive to social and cultural changes". 3. FN24, FN25, FN26, and FN27, endnotes in Delgado and Stefancic (1989), are omitted in the present article. ReferencesAmerican Library Association. 1895. List of Subject Headings for Use in Dictionary Catalogs (1st. ed.) Boston, Published for the A. L. A. Publishing section by the Library bureau. Adler, Melissa. 2017. Cruising the Library: Perversities in the Organization of Knowledge. New York, NY: Fordham University Press. https://doi.org/10.2307/j.ctt1xhr79m. Berman, Sanford. 1971. Prejudices and Antipathies: A Tract on the LC Subject Heads Concerning People. Metuchen, NJ: Scarecrow Press. Berman, Sanford. 1984. "Out of the Kitchen—but not into the Catalog". Technical Services Quarterly 2, nos 1-2: 167-171. Available at: https://doi.org/10.1300/J124v02n01_11. Broughton, Vanda. 2012. Essential Library of Congress Subject Headings. London, UK: Facet Publications. Chan, Lois Mai. 2005. Library of Congress Subject Headings: Principles and Application. Westport, CT: Libraries Unlimited. Cochrane, Pauline A. and Monika I. Kirtland. 1981. "Critical Views of LCSH the Library of Congress Subject Headings: A Bibliographic and Bibliometric Essay and An Analysis of Vocabulary Control in the Library of Congress List of Subject Headings (LCSH)", ERIC Clearinghouse on Information Resources, Syracuse, NY, available at: https://eric.ed.gov/?id5ED208900. Christ, John M. 1972. Concepts and Subject Headings: Their Relation to Information Retrieval and Library Research. Metuchen, NJ: Scarecrow Press. Delgado, Richard and Jean Stefancic. 1989. "Why Do We Tell the Same Stories? Law Reform, Critical Librarianship, and the Triple Helix Dilemma". Stanford Law Review 42, no. 1: 207-225. Dobreski, Brian, Karen Snow, K. and Heather Moulaison-Sandy. 2022. "On Overlap and Otherness: A Comparison of Three Vocabularies’ Approaches to LGBTQ+ Identity". Cataloging and Classification Quarterly 60, nos. 6-7: 490-513. Available at: https://doi.org/10.1080/01639374.2022.2090040. Dwyer, James. 1986. "Alternative Perspectives: A Conversation with Sandy Berman". Technicalities 6, no. 10: 3-9. Dykstra, Mary. 1988. "LC Subject Headings Disguised as a Thesaurus". Library Journal 113, no. 4: 42-46. Fischer, Karen S. 2005. "Critical Views of LCSH, 1990–2001: The Third Bibliographic Essay". Cataloging and Classification Quarterly 41, no. 1: 63-109, available at: https://doi.org/10.1300/J104v41n01_05. Furner, Jonathan and Birger Hjørland. 2023. "The Coverage of Information Science and Knowledge Organization in the Library of Congress Subject Headings". Journal of Documentation 79, no. 5: 1265-1284. https://doi.org/10.1108/JD-11-2022-0256. Ganendran, Jacki. 2000. Learn Library of Congress Subject Access. Lanham, MD: Scarecrow Press. Gross, Tina and Arlene G. Taylor. 2005. "What Have We Got to Lose? The Effect of Controlled Vocabulary on Keyword Searching Results". College and Research Libraries 66, no. 3: 212-230. https://doi.org/10.5860/crl.66.3.212. Hardesty, Juliet L. and Allison Nolan. 2021. "Mitigating Bias in Metadata: A Use Case Using Homosaurus Linked Data". Information Technology and Libraries 40, no. 3: 1-14. Hjørland, Birger. 2012. "Is Classification Necessary after Google?" Journal of Documentation 68, no. 3: 299-317, available at: https://doi.org/10.1108/00220411211225557. Hjørland, Birger. 2023. "Education in Knowledge Organization". Knowledge Organization 50, no. 3: in press. Also available in ISKO Encyclopedia of Knowledge Organization https://www.isko.org/cyclo/education. Larson, Ray R. 1991. "The Decline of Subject Searching: Long-Term Trends and Patterns of Index Use in an Online Catalog". Journal of the American Society for Information Science 42, no. 3: 197-215. 3.0.CO;2-T">https://doi.org/10.1002/(SICI)1097-4571(199104)42:3<197::AID-ASI6>3.0.CO;2-T. Library of Congress. 1910-1914. Subject Headings Used in the Dictionary Catalogs of the Library of Congress. Washington, DC: US Government Publishing Office, Library Branch Library of Congress. 1975. Library of Congress Subject Headings, 8th ed. Washington, DC: Library of Congress, Subject Cataloging Division, Processing Department. Library of Congress. 1987. "LCSH in Microfiche: The New Look", Cataloguing Service Bulletin, no. 37: 54-56, available at: https://www.loc.gov/cds/PDFdownloads/csb/CSB_037.pdf (accessed 14 November 2022). Library of Congress. 1988. Library of Congress Subject Headings, 11th ed. Washington, DC: Library of Congress. Library of Congress. 2022. Library of Congress Subject Headings, 44th ed. Washington, DC: Library of Congress. Available at: https://www.loc.gov/aba/publications/FreeLCSH/freelcsh.html (accessed 14 November 2022). Lo, Grace. 2019. "'Aliens’'vs Catalogers: Bias in the Library of Congress Subject Heading". Legal Reference Services Quarterly 38, no. 4: 170-196. Available at: https://doi.org/10.1080/0270319X.2019.1696069. Markey, Karen and Cheryl Knott. 2023. Online Searching: A Guide to Finding Quality Information Efficiently and Effectively, 3rd ed. Lanham, MD: Rowman & Littlefield. Miksa, Francis L. 1983. The Subject in the Dictionary Catalog from Cutter to the Present. Chicago, IL: American Library Association. Olson, Hope A. 2000. "Difference, Culture and Change: The Untapped Potential of LCSH". Cataloging and Classification Quarterly 29, nos. 1-2: 53-71, available at: https://doi.org/10.1300/J104v29n01_04. Olson, Hope A. 2001. "The Power to Name: Representation in Library Catalogs". Signs 26, no. 3: 639-668. Scott, Randall W. 1988. "HCL Bibliographic Products" (Book Review). Library Journal, May 15, 1988: 64. Shubert, Steven Blake. 1992. "Critical Views of LCSH–Ten Years Later: A Bibliographic Essay". Cataloging and Classification Quarterly 15, no. 2: 37-97, available at: https://doi.org/10.1300/J104v15n02_04 (accessed 12 September 2023). Snow, Karen. 2021. A Practical Guide to Library of Congress Subject Headings. Lanham, MD: Rowman & Littlefield. Stone, Alva T. (ed.). 2000. The LCSH Century: One Hundred Years with the Library of Congress Subject Headings System. New York: Haworth Information. Studwell, William E. 1990. Library of Congress Subject Headings: Philosophy, Practice and Prospects. Binghamton, NY: Haworth Press. (Transferred to digital version published by Routledge 2009). Wellisch, Hans H. 1981. "Year's Work in Subject Analysis: 1980". Library Resources and Technical Services 25, no. 3: 295-309.
Version 1.0 published 2023-09-19 Article category: This editorial article is not peer-reviewed and is not being published in the journal Knowledge Organization. How to cite it: Hjørland, Birger and Claudio Gnoli eds. 2023. "Library of Congress Subject Headings (LCSH)". Preliminary editorial placeholder article. In ISKO Encyclopedia of Knowledge Organization, https://www.isko.org/cyclo/lcsh ©2023 ISKO. All rights reserved. |
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