Document (#26155)

Author
Nelson, S.J.
Johnston, W.D.
Humphreys, B.L.
Title
Relationships in Medical Subject Headings (MeSH)
Source
Relationships in the organization of knowledge. Eds.: Bean, C.A. u. R. Green
Imprint
Boston, MA : Kluwer Academic
Year
2001
Pages
S.171-184
Series
Information science and knowledge management; vol.2
Abstract
Recent efforts to make some of the relationships within McSH more explicit have led to a deeper understanding of the nature of these relationships. This chapter will explore the relationships represented in McSH in the light of that understanding. Every term that occurs may be thought of as representing a concept. One or more terms, comprising one or more concepts, grouped together for important reasons, form a descriptor class. The descriptor class is the basic building block of the thesaurus. Relationships among concepts can be represented expiicitly in the thesaurus, most notably as relationships within the descriptor class. Hierarchical relationships are at the level of the descriptor class. The hierarchies are key in allowing expanded retrievals. The hierarchical relationships, traditionally thought of as broader or narrower (parent-child) relationships, are better understood as representing broader and narrower retrieval sets. Nevertheless, these hierarchical relationships often reflect important broader-narrower relationships between preferred concepts in descriptor classes. Other types of relationships present in the thesaurus include associative relationships, such as the Pharmacologic Actions or see-related cross references, as well as forbidden combination expressions, such as the Entry Combination.
Field
Medizin
Object
MeSH

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