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Abstract

The specter of impending change in library catalogues is strong but not very clear. In an attempt to help the clarification process, the first part of the present report discusses historical themes from the modern library catalogue legacy that has developed since the mid-nineteenth century-the origins and subsequent dominance of the dictionary catalogue for more than a century, considerations of library catalogue users and use over the same period, developments apart from the library catalogue during the twentieth century that have affected it, and aspects of the idea of the objects of a catalogue. In a second part, the general environment for the most recent period of library catalogue development is described, after which aspects of the historical legacy are used as a basis for raising questions relevant to impending library catalogue change.

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Abstract

The "Relative Index" of the Dewey Decimal Classification (DDC) is investigated over the span of its lifetime in 22 editions of the DDC as to its character as a concept indexing system, its provision of conceptual contexts for the terms it lists, and the way in which the index intersects with special tables of categories used in the system. Striking features of the index that are discussed include how the locater function of an index is expressed in it, its practice of including concepts that have not been given specific notational locations in the system, its two methods of providing conceptual contexts for indexed terms (by means of the notation of the system and by the insertion of enhancement terms that portray conceptual context), and how the index has intersected with three types of special tables of categories in the system. Critical issues raised include the indexing of constructed or synthesized complex concepts, inconsistencies in how enhancement terms are portrayed and the absence of them in some instances, the problem of equating conceptual context with disciplinary context, and problems associated with not indexing one type of special table. Summary and conclusions are extended to problems that arise in studying the index.