Page 182 - DLIS405_INFORMATION_STORAGE_AND_RETRIEVAL

Unit 14: ERIC and Thesaurofacet

Specificity Notes
SN The exactness with which a vocabulary term covers a concept. Thus, in considering the concept
“dog,” the term “canine” is more specific than “animal.” Increasing specificity of vocabulary terms
increases precision andgranularity, but may decrease recall.
RT Exhaustivity
Granularity

Synonym Equivalence List
SN A synonym ring or an authority file.
BT Controlled Vocabulary
RT Authority File
Synonym Ring

Synonym Ring

SN One of the simplest of controlled vocabularies. Includes only a list of equivalent terms. When
one of the terms is searched, the synonym ring returns results as if the complete set of terms was
searched.
BT Controlled Vocabulary
RT Equivalence Relationship
Synonym Equivalence List

Taxonomy
SN A controlled vocabulary, the preferred terms of which are all connected in
a hierarchy or polyhierarchy. Terms in a taxonomy may exhibit equivalence or hierarchical
relationships.
BT Controlled Vocabulary
RT Hierarchical Relationship
Hierarchy
Polyhierarchy

Term
USE Vocabulary Term

Term Relationship

SN The type of association between vocabulary terms. Terms may be broader, narrower, related or
variant, exhibiting hierarchical, associative or equivalence relationships.
NT Associative Relationship
Equivalence Relationship
Hierarchical Relationship
RT Broader Term
Narrower Term

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