-
Röttsches, H.: Thesauruspflege im Verbund der Bibliotheken der obersten Bundesbehörden (1989)
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- Source
- Mitteilungen der Arbeitsgemeinschaft der Parlaments- und Behördenbibliotheken. 1989, H.67, S.1-22
- Type
- a
-
Eastman, C.M.: Overlaps in postings to thesaurus terms : a preliminary study (1988)
0.03
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- Abstract
- The patterns of overlap between terms which are closely related in a thesaurus are considered. The relationships considered are parent/child, in which one term is a broader term of the other, and sibling in which to 2 terms share the same broader term. The patterns of overlap observed in the MeSH thesaurus with respect to selected MEDLINE postings are examined. The implications of the overlap patterns are discussed, in particular, the impact of the overlap patterns on the potential effectiveness of a proposed algorithm for handling negation is considered.
- Date
- 25.12.1995 22:52:34
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- a
-
Mooers, C.N.: ¬The indexing language of an information retrieval system (1985)
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- Abstract
- Calvin Mooers' work toward the resolution of the problem of ambiguity in indexing went unrecognized for years. At the time he introduced the "descriptor" - a term with a very distinct meaning-indexers were, for the most part, taking index terms directly from the document, without either rationalizing them with context or normalizing them with some kind of classification. It is ironic that Mooers' term came to be attached to the popular but unsophisticated indexing methods which he was trying to root out. Simply expressed, what Mooers did was to take the dictionary definitions of terms and redefine them so clearly that they could not be used in any context except that provided by the new definition. He did, at great pains, construct such meanings for over four hundred words; disambiguation and specificity were sought after and found for these words. He proposed that all indexers adopt this method so that when the index supplied a term, it also supplied the exact meaning for that term as used in the indexed document. The same term used differently in another document would be defined differently and possibly renamed to avoid ambiguity. The disambiguation was achieved by using unabridged dictionaries and other sources of defining terminology. In practice, this tends to produce circularity in definition, that is, word A refers to word B which refers to word C which refers to word A. It was necessary, therefore, to break this chain by creating a new, definitive meaning for each word. Eventually, means such as those used by Austin (q.v.) for PRECIS achieved the same purpose, but by much more complex means than just creating a unique definition of each term. Mooers, however, was probably the first to realize how confusing undefined terminology could be. Early automatic indexers dealt with distinct disciplines and, as long as they did not stray beyond disciplinary boundaries, a quick and dirty keyword approach was satisfactory. The trouble came when attempts were made to make a combined index for two or more distinct disciplines. A number of processes have since been developed, mostly involving tagging of some kind or use of strings. Mooers' solution has rarely been considered seriously and probably would be extremely difficult to apply now because of so much interdisciplinarity. But for a specific, weIl defined field, it is still weIl worth considering. Mooers received training in mathematics and physics from the University of Minnesota and the Massachusetts Institute of Technology. He was the founder of Zator Company, which developed and marketed a coded card information retrieval system, and of Rockford Research, Inc., which engages in research in information science. He is the inventor of the TRAC computer language.
- Footnote
- Original in: Information retrieval today: papers presented at an Institute conducted by the Library School and the Center for Continuation Study, University of Minnesota, Sept. 19-22, 1962. Ed. by Wesley Simonton. Minneapolis, Minn.: The Center, 1963. S.21-36.
- Source
- Theory of subject analysis: a sourcebook. Ed.: L.M. Chan, et al
- Type
- a
-
Sager, J.C.: Terminological thesaurus : a more appropriate designation or a deprecated synonym? (1982)
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McMath, C.F.; Tamaru, R.S.; Rada, R.: ¬A graphical thesaurus-based information retrieval system (1989)
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-
Panyr, J.: Thesaurus und wissensbasierte Systeme - Thesauri und Wissensbasen (1988)
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Burkart, M.: Neue Thesaurusansätze - frischer Wind in alten Segeln? (1988)
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Hitzeroth, C.: Bibliographie zur Thesaurus-Literatur (1988)
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Foskett, D.J.: Thesaurus (1980)
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Buchan, R.L.: Intertwining thesauri and dictionaries (1989)
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Lee, W.G.; Ishikawa, Y.; Yamagishi, T.; Nishioka, A.; Hatada, K.; Ohbo, N.; Fujiwara, S.: ¬A dynamic thesaurus for intelligent access to research databases (1989)
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- Abstract
- Although thesauri can be solve some problems posed by computerised data base searching (synonyms, generic representation) their compilation requires extensive time and effort of experts and their maintenance is also difficult. Describes how a thesaurus was compiled and maintained automatically by taking advantage of the specially designed formats to input expertise with ease. The thesaurus was named a dynamic thesaurus because it depends on the set of stored data and is adapted to the necessary and sufficient range of keywords. A data base of polymers is taken as an example.
-
Bellamy, L.M.; Bickham, L.: Thesaurus development for subject cataloging (1989)
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- Abstract
- The biomedical book collection in the Genetech Library and Information Services was first inventoried and cataloged in 1983 when it totaled about 2000 titles. Cataloging records were retrieved from the OCLC system and used as a basis for cataloging. A year of cataloging produced a list of 1900 subject terms. More than one term describing the same concept often appears on the list, and no hierarchical structure related the terms to one another. As the collection grew, the subject catalog became increasingly inconsistent. To bring consistency to subject cataloging, a thesaurus of biomedical terms was constructed using the list of subject headings as a basis. This thesaurus follows the broad categories of the National Library of Medicine's Medical Subject Headings and, with some exceptions, the Guidelines for the Establishment and Development of Monolingual Thesauri. It has enabled the cataloger in providing greater in-depth subject analysis of materials added to the collection and in consistently assigning subject headings to cataloging record.
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-
Aitchison, J.; Gilchrist, A.: Thesaurus construction : a practical manual (1987)
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-
Rostek, L.; Fischer, D.H.: Objektorientierte Modellierung eines Thesaurus auf der Basis eines Frame-Systems mit graphischer Benutzerschnittstelle (1988)
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-
Rodejohann, J.: Probleme mit politisch geprägten Benennungen von Begriffen bei der Erstellung eines politikwissenschaftlichen Thesaurus (1987)
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Bertrand-Gastaldy, S.; Davidson, C.H.: Improved design of graphic displays in thesauri : through technology and ergonomics (1986)
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-
Schöndorf, P.: Nicht-konventionelle Thesaurusrelationen als Orientierungshilfen für Indexierung und Recherche: Analyse ausgewählter Beispiele (1988)
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Maniez, J.: Relationships in thesauri : some critical remarks (1988)
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- Abstract
- After reviewing some fundamental distinctions in relationships (paradigmatic/sytagmatic, interconceptual/ structural) the author proposes a functional approach for investigating the relationships in thesauri. The comparison between three closely related types of semantic fields (lexical, conceptual, thesaural) shows the specific function of relationships in all of these intellectual tools. In information retrieval the two main functions are location of relevant concepts and search of exhaustivity. a clear distinction of these aims can contribute to solving the difficult problem of the choice of 'related terms'. It is suggested that their usefulness relies upon empirical rather than upon semantic proximity. Some practical propositions are amde for the choice and display of relationships in thesauri
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- a
-
Petersen, T.: Information on images : the Art and Architecture Thesaurus (1989)
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- Abstract
- The Art and Architecture Thesaurus (AAT) was designed as a comprehensive vocabulary in its domain. Its faceted, hierarchically arranged structure allows for powerful indexing and retrieval capabilities, while its planned network of related term relationships makes it especially amenable to natural language processing. To gauge the AAT's effectiveness as a search tool against natural language queries, an experiment was carried out on DIALOG. There are 3 art data bases on DIALOG and there are also a number of other data bases that contain art related material. The experiment used queries culled from reference librarians at art and architecture libraries.
-
Townley, H.M.; Gee, R.G.: Thesaurus-making : grow your own wordstock (1980)
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- Series
- A Grafton book
