ORGANIZATION OF ELEMENTS OF INFORMATION The Thesaurus.

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Presentation transcript:

ORGANIZATION OF ELEMENTS OF INFORMATION The Thesaurus

Thesaurus From Greek, meaning “treasure” A compilation of words and phrases showing synonymous, hierarchical, and other relationships and dependences, the function of which is to provide a standard vocabulary for information storage and retrieval--ANSI

Relation to Classification Scheme Alphabetical and hierarchical Number of locations for a term Facets

Purpose Promote consistent representation of subject matter Link terms related either permanently or transitorily

History Peter Mark Roget Society for the Diffusion of Knowledge Thesaurus of English Words and Phrases Classified and Arranged so as to Facilitate the Expression of Ideas and Assist in Literary Composition (1852)

History Information retrieval thesaurus, 1960s-

Structure

Hierarchical Relationships Broader Term (BT): Science Narrower Term (NT): Physics

Hierarchical relationships Genus-speciesPartitive

Hierarchical relationships Examples

Affinitive/Associative Relationship “RT”

Descriptors Nouns, phrases Gravity Specific gravity Center of gravity

Descriptors Split Multiple classes  Children’s books Retain compound Take more than one way  Plate glass/glass plate

Scope note “SN” Define or clarify the term

Preferential relationship Equivalent of “see” reference in index “Use” and “Use for” Use: stamp collecting Use for: Philately

Preferential relationship Example

Display Alphabetical

Display Hierarchical

Construction Consolidation Original indexing Maintenance s/z39-19a.pdf

Evaluation Breadth of coverage Handling of structural relationship Effectiveness of display

Thesaurus - ERIC

Thesaurus Examples online: NASA: UNESCO:

Solution