Search (64 results, page 2 of 4)

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Abstract

Julius Otto Kaiser (1968-1927) was a special librarian and indexer who, at the turn of the twentieth century, designed an innovative, category-based indexing system known as "systematic indexing." Although he is regarded as a pioneer of indexing and classification, little is known about his life. This essay seeks to fill in some gaps in Kaiser's biography by reviewing what is known of his life prior to his entry into information work: namely, his birth, childhood, and education in Germany; his early career as a musician and teacher in Australia; and his sojourn as a teacher in Chile. It is argued that Kaiser's early experiences equipped him with linguistic skills and a commercial outlook that smoothed his path into the world of business information and left traces in his thought about indexing and information work.

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a

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Abstract

In 1934, a Belgian entrepreneur named Paul Otlet sketched out plans for a worldwide network of computers-or "electric telescopes," as he called them - that would allow people anywhere in the world to search and browse through millions of books, newspapers, photographs, films and sound recordings, all linked together in what he termed a reseau mondial: a "worldwide web." Today, Otlet and his visionary proto-Internet have been all but forgotten, thanks to a series of historical misfortunes - not least of which involved the Nazis marching into Brussels and destroying most of his life's work. In the years since Otlet's death, however, the world has witnessed the emergence of a global network that has proved him right about the possibilities - and the perils - of networked information. In Cataloging the World, Alex Wright brings to light the forgotten genius of Paul Otlet, an introverted librarian who harbored a bookworm's dream to organize all the world's information. Recognizing the limitations of traditional libraries and archives, Otlet began to imagine a radically new way of organizing information, and undertook his life's great work: a universal bibliography of all the world's published knowledge that ultimately totaled more than 12 million individual entries. That effort eventually evolved into the Mundaneum, a vast "city of knowledge" that opened its doors to the public in 1921 to widespread attention. Like many ambitious dreams, however, Otlet's eventually faltered, a victim to technological constraints and political upheaval in Europe on the eve of World War II. Wright tells not just the story of a failed entrepreneur, but the story of a powerful idea - the dream of universal knowledge - that has captivated humankind since before the great Library at Alexandria. Cataloging the World explores this story through the prism of today's digital age, considering the intellectual challenge and tantalizing vision of Otlet's digital universe that in some ways seems far more sophisticated than the Web as we know it today.
The dream of universal knowledge hardly started with the digital age. From the archives of Sumeria to the Library of Alexandria, humanity has long wrestled with information overload and management of intellectual output. Revived during the Renaissance and picking up pace in the Enlightenment, the dream grew and by the late nineteenth century was embraced by a number of visionaries who felt that at long last it was within their grasp. Among them, Paul Otlet stands out. A librarian by training, he worked at expanding the potential of the catalogue card -- the world's first information chip. From there followed universal libraries and reading rooms, connecting his native Belgium to the world -- by means of vast collections of cards that brought together everything that had ever been put to paper. Recognizing that the rapid acceleration of technology was transforming the world's intellectual landscape, Otlet devoted himself to creating a universal bibliography of all published knowledge. Ultimately totaling more than 12 million individual entries, it would evolve into the Mundaneum, a vast "city of knowledge" that opened its doors to the public in 1921. By 1934, Otlet had drawn up plans for a network of "electric telescopes" that would allow people everywhere to search through books, newspapers, photographs, and recordings, all linked together in what he termed a réseau mondial: a worldwide web. It all seemed possible, almost until the moment when the Nazis marched into Brussels and carted it all away. In Cataloging the World, Alex Wright places Otlet in the long continuum of visionaries and pioneers who have dreamed of unifying the world's knowledge, from H.G. Wells and Melvil Dewey to Ted Nelson and Steve Jobs. And while history has passed Otlet by, Wright shows that his legacy persists in today's networked age, where Internet corporations like Google and Twitter play much the same role that Otlet envisioned for the Mundaneum -- as the gathering and distribution channels for the world's intellectual output. In this sense, Cataloging the World is more than just the story of a failed entrepreneur; it is an ongoing story of a powerful idea that has captivated humanity from time immemorial, and that continues to inspire many of us in today's digital age.

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Abstract

Provides a history of the development of coordinate indexing and searching. In the 1930s scientists began to use edge notched punched cards for searching. The Batten system was invented in 1944. Following the World War 2 these systems underwent major enhancements: Calvin Mooers built up the punched card system with his Zatocoding, and Mortimer Taube enlarged the peek-a-boo system with his Uniterm development. 2 computerizations' of Taube's Uniterm system led to the present day world of information retrieval

Footnote

Contribution to part 1 of a 2 part series on the history of documentation and information science

Type

a

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Abstract

The idea of computing with concepts as mathematicians manipulate variables in equations goes back at least as far as G. W. Leibniz (1663). Leibniz dreamed of a universal calculus, an ambiguity-free language, with which scholars could communicate ideas with mathematical precision. George Boole, in his investigation of the laws of thought, contributed to the realization of this idea by developing a calculus of classes (1847). A modern visionary who saw a practical application of Boole's work and further contributed to the idea of communicating by "computing" was Mortimer Taube (1910-1965), a member of the Library of Congress staff from 1944 to 1949 who later founded Documentation, Inc. He proposed communicating with a mechanized information store by combining concepts using the Boolean operators, AND, OR and NOT. The following selection contains one of the first presentations of a technique Taube called "coordinate indexing" and what later has come to be called "post coordinate indexing" or Boolean searching. This selection is interesting an three counts. It is interesting first of all because of its early date-1950. Though the idea of coordinate indexing had been anticipated in manual systems of the punched card sort, these systems were limited, relying for the most part an repeated application of the AND operator. To conceptualize the full power that could be achieved by Boolean search strategy in mechanized systems was an imaginative step forward. Second, the selection is interesting insofar as the idea of coordinate indexing is couched, indeed nearly hidden, in a somewhat ponderous essay an the compatibility of universal and special classifications and the merits of different methods of information organization. Ponderous though it is, the essay is worth a careful reading. The perspective it gives is enlightening, a reminder that the roots of information science reach far back into the bibliographic past. The third and perhaps most interesting aspect of this selection is that in it Taube looks beyond the technique of coordinate indexing to envisage its implications an bibliographic organization. (Now more than thirty years later we are still attempting to understand these implications.) What Taube saw was a new method of bibliographic organization, which, not ingenuously, he observed might seem almost bumptious in the face of a two thousand year history of organizing information. This "new" method was, however, being proposed elsewhere, albeit in different guise, by S. R. Ranganathan (q.v.) and his school. It was the method of organizing information using abstract categories called fields or facets. These categories, unlike those used in the great traditional classifications, were not locked in procrustean hierarchical structures, but could be freely synthesized or combined in indexing or retrieval. In short, Taube's voice was among those at midcentury supporting the move from enumerative to synthetic subject approaches. The fact that it was an American voice and one especially weIl informed about bibliography and computers is perhaps what led Jesse Shera to refer to Taube as "the Melvil Dewey ... of midtwentieth century American Librarianship," one who was able "to weld successfully conventional librarianship and the then-emerging information science."

Source

Theory of subject analysis: a sourcebook. Ed.: L.M. Chan, et al

Type

a

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Abstract

Argentine library science literature reflects a diverse interest in the subject organization of library collections. Early writings looked at the need to organize one library in particular (the National Library methodical catalog of 1893); and, therefore, the central issue was the adoption of a practical model of library organization. However, the twentieth century inaugurated the era of library studies in the strictest sense. It began an exchange of ideas about the advantages and disadvantages of decimal classification, and it resulted in the work of Carlos V. Penna by the middle of the century. This article is based on the analysis and interpretation of the primary sources, with the purpose of identifying the influences of European and American library thought on the development of the history of classification in Argentina in a period during which a national library identity began to develop.

Type

a

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Abstract

This article explores how linguistics has influenced information retrieval (IR) and attempts to explain the impact of linguistics through an analysis of internal developments in information science generally, and IR in particular. It notes that information science/IR has been evolving from a case science into a fully fledged, "disciplined"/disciplinary science. The article establishes correspondences between linguistics and information science/IR using the three established IR paradigms-physical, cognitive, and computational-as a frame of reference. The current relationship between information science/IR and linguistics is elucidated through discussion of some recent information science publications dealing with linguistic topics and a novel technique, "keyword collocation analysis," is introduced. Insights from interdisciplinarity research and case theory are also discussed. It is demonstrated that the three stages of interdisciplinarity, namely multidisciplinarity, interdisciplinarity (in the narrow sense), and transdisciplinarity, can be linked to different phases of the information science/IR-linguistics relationship and connected to different ways of using linguistic theory in information science and IR.

Type

a

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Abstract

This paper outlines the life and work of Paul Otlet (1868-1944). Otlet was a founder of the scholarly disciplines of bibliography, documentation, and information science. As a result of the work he undertook with Henri La Fontaine (1854-1943)-specifically, the establishment in 1895 in Brussels of the International Institute of Bibliography, which aimed to construct a Universal Bibliographic Repertory-Otlet has become known as the father of the Internet. Otlet's grand project, as stated in his Traité de documentation (1934), was never fully realized. Even before his death, the collections he assembled had been dismembered. After his death, the problematic conditions in which Otlet's personal papers and the collections he had created were preserved meant that his thought and work remained largely unacknowledged. It fell to W. Boyd Rayward, who began to work on Otlet in the late 1960s, to rescue him from obscurity, publishing in 1975 a major biography of the pioneer knowledge entrepreneur and internationalist progenitor of the World Wide Web.

Type

a

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Abstract

This article examines changing views on "systematic" or classified shelf-arrangement in German library science from Kayser's 1790 work Ueber die Manipulation bey der Einrichtung einer Bibliothek to the 1914 Versammlung deutscher Bibliothekare in Leipzig, at which Georg Leyh delivered the seminal paper, "Systematische oder mechanische Aufstellung?" Systematic arrangement was, with few exceptions, held up as an ideal throughout the nineteenth century; but by 1914 it could be agreed to belong to a past era in which, in the words of Leyh, libraries ran as a "Kleinbetrieb" [small business] (Leyh 1913, 100, "Das Dogma von der systematischen Aufstellung II-IV." Zentralblatt für Bibliothekswesen 30:97-135). In particular, this article seeks to explore how changing views on the ideal of systematic shelf-arrangement in German library science during this period reflected evolving conceptions of librarianship. For nineteenth-century writers such as Ebert, Molbech, and Petzholdt, systematic classification and arrangement had meaning against the backdrop of an encyclopedic tradition within which libraries and librarians played an important role in organizing and presenting a rational overview of the universe of knowledge - an overview that was to be both physical and intellectual. The waning of the ideal of systematic arrangement at the turn of the twentieth century was associated with a sense of loss, as an intellectual or "scholarly" tradition of librarianship was seen to give way to more utilitarian and "bureaucratic" expectations. The changing fortunes of the ideal of systematic arrangement in German library science between 1790 and 1914 may be seen to illustrate how progress and loss are often inextricably linked in the history of libraries and librarianship

Type

a

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Abstract

Nowadays, tremendous information sources are preserved, ranging from those of a traditional nature like libraries and museums to new formats like electronic databases and the World Wide Web. Making these sources consistent, easily accessible, and as complete as possible is challenging. Almost a century ago, people like Paul Otlet were already fully aware of this need and tried to develop ways of making human knowledge more accessible using the resources and technology available at that time. Otlet's ideas about a Universal Network of Documentation and the Universal Book are clear examples of such efforts. Computer science currently provides the means to build digital spaces that consist of (multimedia) information sources connected through the Internet. In this article, we give a nontechnical overview of the current state of the art in information management. Next, we focus on those aspects of Otlet's work that deal with the organization of knowledge and information sources. Then we study the potential connections between Otlet's work and the state of the art of computerized information management from a computer scientist's point of view. Finally, we consider some of the problems and challenges that information management still faces today and what computer science professionals have in common with, and can still learn from, Otlet and his work.

Type

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Abstract

The combinatorial thinking of the chemist and Nobel laureate Wilhelm Ostwald grew out of his activities in chemistry and was further developed in his philosophy of nature. Ostwald used combinatorics as an analogous, creative, and interdisciplinary way of thinking in areas like knowledge organization and in his theory of colors and forms. His work marginally influenced art movements like the German Werkbund, the Dutch De Stijl, and the Bauhaus. Ostwald's activities and his use of spatial analogies such as bridge, net, or pyramid can be viewed as support for a relation between information-or "in-formation," or Bildung (education, formation)-and form.

Type

a

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Abstract

This writeup presents the fundamentals of subject indexing in terms of its development, scope, coverage, role in subject indexing techniques and the important elements to design a well-structured and effective subject indexing process, requirements and the infrastructure. From the time of RDC to PRECIS, the developers has been envisaged the problems to expand the flexibility and versatility of indexing technique. Whenever one indexing process is failed to achieve the maximum efficiency another is developed on the basis of failure. It concludes that all the developments of subject indexing processes during that era are leads to the innovation of Artificial Intelligence technique (AI), i.e. Natural Language Processing (NLP) by implementation of Information and Communication Technology (ICT) in present time.

Type

a

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Abstract

The publication in 1876 of Rules for a Printed Catalogue by Charies A. Cutter (1837-1903) was a landmark in the literature of library science. This code provided the basis for all subsequent codes of descriptive cataloging and catapulted the dictionary catalog into the position of being the predominant form of catalog in American libraries in years to come. Cutter's rules for subject entry were the first and, in essence, still the only codification of the alphabetical subject catalog. These Rules represented the culmination of many years' experience in compiling the dictionary catalog of the Boston Athenaeum (published in 18741882) during Cutter's tenure as its librarian from 1869 to 1893. Prior to the advent of the dictionary catalog, the popular method for organizing subject entries in a catalog was the classified arrangement, in the form of either the classed catalog (usually based an a particular classification scheme) or the alphabetico-classed catalog, in which the primary objective was subject collocation. Subject entries were arranged systematically and logically according to their subject relationships. In the alphabetical subject arrangement in the dictionary catalog, an the other hand, the primary objective is what Cutter calls the "facility of reference"; in other words, subjects can be located quickly in the catalog because they are listed directly under their specific names in an alphabetical order. Unlike the classed catalog which requires an accompanying index, the alphabetical subject catalog combines the functions of the subject entries and index in one alphabetical sequence, even though at the expense of subject collocation.
Some of the advantages of the classed catalog were then reintroduced into the alphabetical subject catalog through see also references and, to some extent, by the use of inverted headings. Although never officially acknowledged, Cutter's principles provided the philosophical underpinnings for the Library of Congress and the Sears subject headings systems. His principles of common usage, specific entry, uniform heading, and syndetic structure have been reflected in the Library of Congress Subject Headings practice and reiterated by David Judson Haykin (q.v.) in his exposition of the Library of Congress system. Cutter's definition of "specific entry" has been frequently quoted as the basis of the alphabetical subject catalog. Because Cutter's Rules are no longer in print, the following excerpt contains all the rules an subject entry from the fourth edition of Rules for a Dictionary Catalog. These rules, first published over a hundred years ago, do not address all the problems encountered in subject analysis in modern times. Nonetheless, many of his ideas are still valid and manifested in subject cataloging practice in American libraries today. Moreover, as A. C. Foskett comments, "his Rules can still be read with profit (and, more unusual in such works, pleasure) today."

Footnote

Original in: Cutter, C.A.: Rules for a dictionary catalog. 4th ed. Washington, DC: Government Printing Office 1904, S.66-82

Source

Theory of subject analysis: a sourcebook. Ed.: L.M. Chan, et al

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a

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Abstract

A social constructivist approach to systems of knowledge organization applies Collins's 'empirical programme of relativism' to the analysis of the DDC. The social constructivist programme shows that stability of the DDC's final form depends not upon solutions to epistemological problems, but upon the successful negotiation of specific social processes: (1) closing debates about alternative knowledge organizations; (2) building specific supportive institutions; (3) establishing links with dominant forms of social organization

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Abstract

Tim Berners-Lee described in Weaving the Web his future vision of the World Wide Web in two parts. In the first one, nowadays called Web 2.0, people collaborate and enrich data together in a shared information space. In the second part, exchanges extend to computers, resulting in a "Semantic Web" (Berners-Lee 2000a, 157). Most historical studies of World Wide Web begin with the American roots of the Internet in ARPANET or follow a historiographical line of post war information revolutionaries, from Vannevar Bush to Tim Berners-Lee. This paper follows an alternative line. At the end of the nineteenth and in the first decades of the twentieth century various European scholars, like Patrick Geddes, Paul Otlet, Otto Neurath, and Wilhelm Ostwald explored the organisation, enrichment and dissemination of knowledge on a global level to come to a peaceful, universal society. We focus on Paul Otlet (1868-1944) who developed a knowledge infrastructure to update information mechanically and manually in collaboratories of scholars. First the Understanding Infrastructure (2007) report, that Paul N. Edwards et al. wrote on behalf of NSF, will be used to position Otlet's knowledge organization in their sketched development from information systems to information internetworks or webs. Secondly, the relevance of Otlet's knowledge infrastructure will be assessed for Web 2.0 and Semantic Web applications for research. The hypothesis will be put forward that the instruments and protocols envisioned by Otlet to enhance collaborative knowledge production, can still be relevant for current conceptualizations of "scientific authority" in data sharing and annotation in Web 2.0 applications and the modeling of the Semantic Web.

Type

a

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Abstract

The invention of automatic indexing using a keyword-in-context approach has generally been attributed solely to Hans Peter Luhn of IBM. This article shows that credit for this invention belongs equally to Luhn and Herbert Ohlman of the System Development Corporation. It also traces the origins of title derivative automatic indexing, its development and implementation, and current status.

Type

a

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Abstract

In Information and Intrigue Colin Burke tells the story of one man's plan to revolutionize the world's science information systems and how science itself became enmeshed with ideology and the institutions of modern liberalism. In the 1890s, the idealistic American Herbert Haviland Field established the Concilium Bibliographicum, a Switzerland-based science information service that sent millions of index cards to American and European scientists. Field's radical new idea was to index major ideas rather than books or documents. In his struggle to create and maintain his system, Field became entangled with nationalistic struggles over the control of science information, the new system of American philanthropy (powered by millionaires), the politics of an emerging American professional science, and in the efforts of another information visionary, Paul Otlet, to create a pre-digital worldwide database for all subjects. World War I shuttered the Concilium, and postwar efforts to revive it failed. Field himself died in the influenza epidemic of 1918. Burke carries the story into the next generation, however, describing the astonishingly varied career of Field's son, Noel, who became a diplomat, an information source for Soviet intelligence (as was his friend Alger Hiss), a secret World War II informant for Allen Dulles, and a prisoner of Stalin. Along the way, Burke touches on a range of topics, including the new entrepreneurial university, Soviet espionage in America, and further efforts to classify knowledge.

Content

Raising a perfectly modern HerbertAn unexpected library revolution, at an unexpected place, by an unusual young fellow -- The great men at Harvard and Herbert's information "calling" -- Challenging the British "Lion" of science information -- New information ideas in Zurich, not Brooklyn or Paris -- Starting an information revolution and business, the hard way -- Big debts, big gamble, big building, big friends, a special librarian -- Lydia's other adventurous boy, family responsibilities, to America with hat in hand, war -- From information to intrigue, Herbert, WWI, a young Allen Dulles -- Returning to a family in decline, meeting with the liberal establishment -- To the centers of science and political power, and a new information world -- More conflicts between old and new science -- Wistar and the Council's abstracts vs. Field's elegant classification, round 1 -- A Concilium without Herbert Field, Nina and the Rockefeller's great decisions -- A voyage home and the Council's vision for world science vs. the Concilium, round 2 -- The information consequences of "capitalism's disaster" and the shift to applied science information -- The 1930's ideological journey of the Fields and their liberal friends -- Intrigue begins, in Switzerland, England, and Cambridge -- New loves, a family of agents, science information in war, librarians stealing books?, Soviet espionage without cost -- Looking forward to more intrigue, the postwar stories of big science, big information, and more ideology.

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Content

Enthält u.a. den Wiederabdruck der folgenden Beiträge: The need for a faceted classification as the basis of all methods of information retrieval (Memorandum of the Classification Research Group, 1955); COATES, E.J.: Classification in information retrieval: the twenty years following Dorking (1978); VICKERY, B.C.: Structure and function in retrieval languages (1971); VICKERY, B.C.: Knowledge representation: a brief review (1986); LEWSI, D.D. u. K. SPARCK JONES: Natural language processing for information retrieval (1996); CLEVERDON, C.W. u. J. MILLS: The testing of indexing language devices (1963); SOERGEL, D.: Indexing and retrieval performance: the logical evidence (1994); SPARCK JONES, K.: Reflections on TREC (1995); KEREN, C.: On information science (1984); SALTON, G.: A note about information science research (1985); SVENONIUS, E.: Unanswered questions in the design of controlled vocabularies (1986); MILSTEAD, J.L.: Needs for research in indexing (1994); WEINER, M.L. u. E.D. LIDDY: Intelligent text processing, and intelligence tradecraft (1995); ZORN, P. et al.: Advanced searching: tricks of the trade (1996); CROFT, W.B.: What do people want from information retrieval? (1995)

Editor

Gilchrist, A.

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Abstract

The author discusses the architectural plans of the Mundaneum made in the 1930s by the Belgian modernist architect Maurice Heymans in the footsteps of Le Corbusier and in collaboration with Paul Otlet. The Mundaneum was the utopian concept of a world center for the accumulation, organization, and dissemination of knowledge, invented by the visionary encyclopedist and internationalist Paul Otlet. In Heymans's architecture, a complex architectural metaphor is created for the Mundaneum, conveying its hidden meaning as a center of initiation into synthesized knowledge. In particular, this article deconstructs the metaphorical architectural complex designed by Heymans and focuses on how the architectural spaces as designed by Heymans are structured in analogy to schemes for the organization of knowledge made by Otlet. In three different designs of the Mundaneum, the analogy is studied between, on the one hand, the architectural structure (designed by Heymans) and, on the other hand, the structure of the cosmology, the book Monde, and the vision of knowledge dissemination as invented by Otlet. The article argues that the analogies between the organization of architectural space and knowledge, as expressed in the drawings of Heymans and Otlet, are elaborated by means of a mode of visual thinking that is parallel to and rooted in the art of memory and utopian imagination.

Type

a

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Abstract

Julia Pettee's contribution to classification theory came about as part of her work an subject headings. Pettee (1872-1967) was for many years librarian of the Union Theological Seminary in New York and was best known for the classification system she developed for the seminary and as the author of the book Subiect Headings. She was one of the first to call attention to the fact that there was a classification system in subject headings. It was, as she put it, "completely concealed when scattered through the alphabetical sequence" (p. 98). On the other hand, she recognized that an index entry was a pointing device and existed to show users specific terms. Index terms, unlike subject headings, could be manipulated, inverted, repeated, and stated in as many words as might be desired. The subject heading, she reiterated, had in it "some idea of classification," but was designed to pull together like material and, unlike the index term, would have limited capability for supplying access by way of synonyms, catchwords, or other associative forms. It is interesting that she also thought of the subject heading in context as forming a three-dimensional system. Logically this is the case whenever one attempts to reach beyond the conventional hierarchy as described an a plane surface, and, in fact, thought out as if the classification were an a plane surface. Pettee described this dimension variously as names "reaching up and over the surface ... hands clasp[ing] in the air" from an individual term (pp. 99-100). Or, in other context, as the mapping of "the many third-dimensional criss-crossing relationships of subject headings." (p. 103) Investigations following Pettee's insight have shown the nature and the degree of the classification latent in subject headings and also in the cross-references of all indexing systems using cross-references of the associative type ("see also" or equivalent terminology). More importantly, study of this type of connection has revealed jumps in logic and meaning caused by homographs or homonyms and resulting in false connections in classification. Standardized rules for making thesauri have prevented some of the more glaring non sequiturs, but much more still needs to be done. The whole area of "related terms", for example, needs to be brought under control, especially in terms of classification mapping.

Source

Theory of subject analysis: a sourcebook. Ed.: L.M. Chan, et al

Type

a

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Abstract

Julia Pettee's contribution to classification theory came about as part of her work an subject headings. Pettee (1872-1967) was for many years librarian of the Union Theological Seminary in New York and was best known for the classification system she developed for the seminary and as the author of the book Subiect Headings. She was one of the first to call attention to the fact that there was a classification system in subject headings. It was, as she put it, "completely concealed when scattered through the alphabetical sequence" (p. 98). On the other hand, she recognized that an index entry was a pointing device and existed to show users specific terms. Index terms, unlike subject headings, could be manipulated, inverted, repeated, and stated in as many words as might be desired. The subject heading, she reiterated, had in it "some idea of classification," but was designed to pull together like material and, unlike the index term, would have limited capability for supplying access by way of synonyms, catchwords, or other associative forms. It is interesting that she also thought of the subject heading in context as forming a three-dimensional system. Logically this is the case whenever one attempts to reach beyond the conventional hierarchy as described an a plane surface, and, in fact, thought out as if the classification were an a plane surface. Pettee described this dimension variously as names "reaching up and over the surface ... hands clasp[ing] in the air" from an individual term (pp. 99-100). Or, in other context, as the mapping of "the many third-dimensional criss-crossing relationships of subject headings." (p. 103) Investigations following Pettee's insight have shown the nature and the degree of the classification latent in subject headings and also in the cross-references of all indexing systems using cross-references of the associative type ("see also" or equivalent terminology). More importantly, study of this type of connection has revealed jumps in logic and meaning caused by homographs or homonyms and resulting in false connections in classification. Standardized rules for making thesauri have prevented some of the more glaring non sequiturs, but much more still needs to be done. The whole area of "related terms", for example, needs to be brought under control, especially in terms of classification mapping.

Source

Theory of subject analysis: a sourcebook. Ed.: L.M. Chan, et al

Type

a