Search (12 results, page 1 of 1)

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Abstract

Purpose - The paper aims to explain the character and causes of obsolescence in assigned subject descriptors. Design/methodology/approach - The paper takes the form of a conceptual analysis with examples and reference to existing literature. Findings - Subject description comes in two forms: assigning the name or code of a subject to a document and assigning a document to a named subject category. Each method associates a document with the name of a subject. This naming activity is the site of tensions between the procedural need of information systems for stable records and the inherent multiplicity and instability of linguistic expressions. As languages change, previously assigned subject descriptions become obsolescent. The issues, tensions, and compromises involved are introduced. Originality/value - Drawing on the work of Robert Fairthorne and others, an explanation of the unavoidable obsolescence of assigned subject headings is presented. The discussion relates to libraries, but the same issues arise in any context in which subject description is expected to remain useful for an extended period of time.

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Abstract

By the mid 1980s online bibliographic systems retrieved excessively large sets. Conversely, with standard Boolean systems, searches retrieved commonly nothing or too few records. In Nov. 92, 32% of searches yielded nothing from a retrieval set averaging 98. Offers solutions to these problems using MELVYL as a case study. Examines how non topical data such as date, language and location of document can improve topical searches. Explains OASIS and front end phototyping. Discusses adaptive retrieval, strategic commands, expanded retrieval and developments of OASIS. Covers aggregation of filtered sets, related terms, automatic progressive truncation, the SUMMARIZE LIBRARIES command, filing and filtering and collection analysis

Source

Library hi tech. 10(1992) no.4, S.7-22

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Abstract

The transition from searching in a single database to searching a multiplicity of networked databases exacerbates some old difficulties in the design and evaluation of retrieval systems and creates new one. A networked environment calls into question the traditional definitions of recall and relevance. Efficient network searching raises questions about where to look first, where to look next and when to stop searching. The need for 'entry vocabulary' support and the need for support in moving from one system vocabulary to another are increased by the increased use of more different databases. The network environment offers the option of collecting different representations of the same object and merging them into an extended record

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Source

Library hi tech. 10(1992) no.4, S.7-22

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Abstract

Fifteen recommendations are offered for the improvement of online catalogs within the categories of closer connections to users' work environment, SDI, Downloading, reform of LCSH, enhanced search capabilities, and linking with other bibliographies and text

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Abstract

Links commonly refer to models developed for the World Wide Web Consortium, but these are a special case within the wider field of links and references used in resource discovery, including subject indexes to classifications, relationships used in vocabulary control, and search term recommender services. There is a tension between standardised relationships (symbolized by Paul Otlet's modernist universalism and the Semantic Web) and the particular, subjective situations in which individuals try to make sense (symbolized by Ludwik Fleck's emphasis on the influence of local cultural contexts). A subject index to a classification is a collection of links, sometimes qualified by context. Different domains (specialties) have their own cultural contexts and benefit from differently tailored links even when searching within the same resources. Making links is a descriptive, language activity. Probabilistic methods can create links from familiar to unfamiliar vocabularies economically. Links commonly use a limited set of relationships, mainly equivalence, inclusion, and inheritance. A far wider range of relationships would help resource discovery. Extending resource discovery requires not only same-facet links to reach additional resources but also links across different facets to provide explanatory context.

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Abstract

Presents the design of a prototype adaptive online catalogue. Online catalogue searches commonly retrieve too few or too many items. The prototype, implemented as a transparent workstation based front end to a MELVYL online catalogue of the holdings of the 9 campuses of California Universities, adapts to excessive or insufficient retrieval by strategically limiting, sorting or expanding users' searches, based on preferences defined by the user

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Date

13. 6.1996 19:22:20

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Abstract

The growing number and sophistication of online bibliographic and networked based information systems is starting to blur the once clear boundaries that separated print documents. 2 concepts emerge as a consequence of these developments, first the 'union record', an entity which combines multiple catalog records for a single bibliographic item into an extended information object; and 2nd, an information 'dossier', a hypertext-like information object built by linking several distinct but related bibliographic entites

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Source

Knowledge organization in the 21st century: between historical patterns and future prospects. Proceedings of the Thirteenth International ISKO Conference 19-22 May 2014, Kraków, Poland. Ed.: Wieslaw Babik