Document (#5105)

Author

Gretz, M.
Thomas, M.

Title

Indexierungen in biomedizinischen Literaturdatenbanken : eine vergleichende Analyse

Issue

T.1.2

Source

Nachrichten für Dokumentation. 42(1991) H.5, S.337-344 (T.1); 42(1991) H.6, S.405-411 (T.2)

Year

1991

Abstract

Auf der Grundlage von vier Originaldokumenten, d.h. dokumentarischen Bezugseinheiten (DBEs), wird die Indexierung in vier biomedizinischen Online-Datenbanken (MEDLINE, EMBASE, BIOSIS PREVIEWS, SCISEARCH) analysiert. Anhand von Beispielen werden inahltliche Erschließung, Indexierungstiefe, Indexierungsbreite, Indexierungskonsistenz, Präzision (durch syntaktisches Indexieren, Gewichtung, Proximity Operatoren) und Wiederauffindbarkeit (Recall) der in den Datenbanken gespeicherten Dokumentationseinheien (DBEs) untersucht. Die zeitaufwendigere intellektuelle Indexierung bei MEDLINE und EMBASE erweist sich als wesentlich präziser als die schneller verfügbare maschinelle Zuteilung von Deskriptoren in BIOSIS PREVIEWS und SCISEARCH. In Teil 1 der Untersuchung werden die Indexierungen in MEDLINE und EMBASE, in Teil 2 die Deskriptorenzuteilungen in BIOSIS PREVIEWS und SCISEARCH verglichen

Theme

Indexierungsstudien

Object

MEDLINE
EMBASE
BIOSIS PREVIEWS
SCISEARCH

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