Emnesøk i online-kataloger Funksjonalitet sett i lys av IFLAs retningslinjer Kunnskapsorganisasjonsdagene 2000 Jon Anjer

Principle 2 The Headings Principle The following are usually better represented by a list of headings than by an immediate display of bibliographic records: •a particular author •a particular work •a particular subject Guidelines for OPAC Displays

Keyword search on Paris in a collection of newsreels BAD (Immediate display of bibliographic records matched with a keyword- within-record search on subject heading fields): 1. [Les Copains--students in Paris. Hearst vault material, HVMc5762r9A, D65497]. [ca. 1963] 2. Die Deutsche Wochenschau. [Nr. 543]. [ ] 3. Hearst Metrotone news. [Vol. 1, no. 216]. [ ] 4. Hearst Metrotone news. [Vol. 1, no. 254]. [ ] 5. Hearst Metrotone news. [Vol. 1, no. 255]. [ ] 6. Hearst Metrotone news. [Vol. 3, no. 221]. [ ] 7. Hearst Metrotone news. [Vol. 3, no. 274]. [ ] Guidelines for OPAC Displays

Keyword search on Paris in a collection of newsreels BETTER (Headings display of subject headings matched with a keyword-within- heading search): Line no.Term: No. of records: [available for selection] 1. Arc de Triomphe de l’Etoile (Paris, France)1 2. Bands (Music)--France--Paris Bicycle racing--France--Paris Birds--France--Paris Boxing--France--Paris--Matches Carnival--France--Paris. 1 Guidelines for OPAC Displays

Noen ønsker •God indeksering (kontrollerte emnebeskrivende termer) •Søkesystem som anbefaler brukeren til å få fram lister framfor å søke •Mulighet til å se termer i sammenheng i dokumentene –enten ved prekoordinering (strenger) –eller ved å gå videre fra ett søkesett (resultat av søking), og få oversikt over termene brukt i dette settet •Mulighet til navigering mellom relaterte termer •Lett forståelig forklaring av søkefelter, trunkering, avgrensing •Forklaring på hva systemet har gjort

Eksempel: Melvyl over Telnet Browse request: BR SU NOISE NORWAY Browse result: 16 subject headings found 1. Aircraft noise -- Norway -- Mathematical models. 1 book 2. Airport noise -- Norway. 1 book 3. Airport noise -- Norway -- Mathematical models. 2 books 4. Airport noise -- Norway -- Oslo. 3 books 5. Airport noise -- Norway -- Oslo region. 1 book 6. Airport noise -- Norway -- Public opinion. 1 book 7. Automobiles -- Noise -- Law and legislation -- Norway.1 book 8. Noise -- Abatement -- Norway. 1 book 9. Noise -- Norway -- Health aspects. 1 book 10. Noise barriers -- Norway. 1 book 11. Noise control -- Norway. 1 book 12. Noise pollution -- Norway. 1 book 13. Noise pollution -- Norway -- Psychological aspects. 1 book 14. Traffic noise -- Norway. 7 books 15. Traffic noise -- Norway -- Mathematical models. 1 book 16. Traffic noise -- Research -- Norway. 1 book God funksjon, vanskelig å finne for sluttbruker!

Én post: Melvyl over Telnet 1. Author: Aas, Harald. Title: Traffic and the environment : a trans-institutional research programme for road traffic, the environment and health in urban areas (NTNF) / [prepared by Harald Aas]. [Oslo : Institute of Transport Economics, 1991?] Description: 32 p. : col. ill. ; 30 cm. Notes: Includes bibliographical references (p ) Subjects: Roads -- Environmental aspects -- Research -- Norway. Traffic noise -- Research -- Norway. Air quality management -- Norway. Other entries: Transportokonomisk institutt (Norway) Call numbers: UCB Trans TD195.T7 T

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Library of Congress

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University of Saskatchewan Libraries

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British Library of Political & Economic Science

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Digitalarkivet

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