DOD MANUAL FOR BUILDING A TECHNICAL THESAURUS
OFFICE OF NAVAL RESEARCH ARLINGTON VA PROJECT LEX
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Guidelines and conventions are presented for the selection of appropriate technical subject indexing and retrieval terminology and the display of this terminology in a thesaurus format. These conventions were developed by Project LEX, the DoD technical thesaurus task force, in cooperation with the Engineers Joint Council. A discussion is given of 1 the criteria for determining the usefulness of prospective thesaurus terms or descriptors, 2 means of resolving ambiguities among descriptors, and 3 methods for systematically creating a cross reference structure that will display hierarchical and conceptual interrelationships. The thesaurus format comprises five main sections, 1 an introductory statement explaining the purpose of the thesaurus and the way in which it is arranged, 2 an alphabetical listing of all descriptors and cross references, 3 descriptors arranged by subject categories based on the COSATI Subject Category List, 4 a graphic display of hierarchical relationships, and 5 a permuted display of all descriptors in the order of each meaningful word.
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