Information Retrieval Thesaurus

The IS-A test applied to a superordinate and a subordinate term in a thesaurus identifies

a hierarchical relationship between them, which is vertical

This is a term record in

an information retrieval thesaurus; toxicology is the descriptor; and poisons is related equivalently, hazards hierarchically, and pollution associatively to it

The relationship in an information retrieval thesaurus between the words dehydration and water is the

associative relationship

When you use a thesaurus to do a subject search of a periodical index bibliographic database, you

can search down, although not up, semantic hierarchies, because each superordinate/parent descriptor contains its subordinate/child descriptors (for example, in the semantic hierarchy weapons > guns > rifles/pistols "weapons" contains both "guns" and "rifles/pistols," but "guns" contains both "rifles" and "pistols" but not "weapons")

The relationship between an entry term and a descriptor in a thesaurus is the

equivalent relationship

The relationship between the words guns and rifles in a thesaurus is

hierarchical

The relative arrangement in a single group of such words as weapons, guns or firearms, and rifles is called a

semantic hierarchy

An entry term in a thesaurus is a

synonym for a descriptor by which a searcher enters the controlled vocabulary of an information retrieval thesaurus

According to the process of postcoordination in indexing and cataloging in libraries,

the burden of information retrieval is on the searcher

The difference between a dictionary-type thesaurus, such as the one you used in high school, and an information retrieval thesaurus, such as one that you now use in an EBSCOhost database, is that

they lead in opposite directions