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Abstract

The comparative evaluation of different mechanized information systems continues to constitute a controversial topic in the literature. Diametrically differemt opinions, seemingly corroborated through empirical evidence, have been presented since the time of the Cranfield experiments. For literally anything an empirical 'proof' can be submitted provided that suitable examples are selected and methods are chosen. substantial advance in Library and Information Science requires abandoning empiricism. Budd's 'hermeneutic phenomenoloy' seems to constitute a promising substitute

Footnote

Dedicated to Dr. Ingetraut Dahlberg on the occasion of her retirement from ISKO presidency, in recognition of her merits for the foundation of ISKO and of her untiring efforts for its sustainment

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Abstract

The tight adherence to dogmas, created and advocated by authorities and disseminated through hearsay, constitutes an impediment to the progress badly needed in view of the low effectiveness of the vast majority of our bibliographic information systems. The Italian mathematician and physicist Galileo has become famous not only for his discoveries but also for his being exposed to the rejective and even hostile attitude on the part of his contemporaries when he contradicted several dogmas prevailing at that time. This obstructive attitude can be traced throughout the centuries and manifests itself in the field of modern information science, too. An example is the allegedly necessary, inevitable precision/recall relationship, as most recently postulated again by Lancaster (1994). It is believed to be confirmed by emprical evidence, with other empirical evidence to the contrary being neglected. This case even constitutes an example of the suppression of truth in the interest of upholding a dogma

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Abstract

This article introduces a series of 8 papers giving a survey of the decisions to be made in the choice of the most expedient indexing method and presenting a short description of the contents of each of the papers, namely: the definability of the requested information; individual vs. generic concepts; the predictibility of their mode of expression; the fidelity of concept representation: the indexing language vocabulary; the indexing language grammar; the category-controlled interplay between vocabulary and grammar in an indexing language; the practice of information supply: the personal file; the employment of a large indexing language vocabulary; eth employment of an indexing language syntax

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Abstract

The contents of scientific and technical handbooks often needs fast, reliable and precise subject access, even if the searcher is not familiar with the terminology of the book and has not read it beforehand. This requires careful and expert subject indexing in a highly specific indexing vocabulary, as well as the presentation of the resulting index in a lucid, conceptually transparent manner in print and on disk. Index users, when looking up a general subject heading, often ignore the necessity of looking up the appertaining hierarchically subordinate, more specific subject headings, too. They are either not made aware of these subject headings or their use is felt to be too cumbersome. A classifies approach to computerized subject indexing is described which resembles Ranganathan's Classified Catalogue. Through a variety of peculiarities it leads the searcher rapidly and easily to all subject headings related to a primarily chosen one, and to the postings under all these headings

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Abstract

Both classification systems and thesauri have their specific strengths and weaknesses. Through properly combining both approaches one can eliminate the latter and largely preserve the strenghts. 'Classauri' which originate in this well-known way are most effective if they are constructed and applied during computer-aided indexing. A special variety of classaurus is described which is characterized by the employment of simple bur highly effective conceptual and technical devices and by the renunciation of attempts to generate the wording of index entries algorithmically