id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
work_c4wisygkkjb6jiiafjsh5yovye	Raya Fidel	Towards expert systems for the selection of search keys	1986	8	.pdf	application/pdf	6156	397	64	of the searching behavior of human intermediaries revealed a routine for the selection of search keys-freetext or controlled vocabulary-along a decision tree. offers the capability, an intermediary system must examine each term of a request and consider its representation: as a controlled vocabulary key, as a free-text key, or desirable to use a common term as a free-text search key. preferably in combination with other search keys, in order to retrieve citations, select some relevant ones and review their indexing in an attempt to find descriptors that If suitable, searchers use a free-text key to inclusively search concepts that are not grouped together by search systems use of the free-text key students also Lastly, if a request is to be searched on several databases, searchers may map single-meaning terms to descriptors in only a few of the relevant controlled vocabularies. against the use of common terms as free-text search keys.	./cache/work_c4wisygkkjb6jiiafjsh5yovye.pdf	./txt/work_c4wisygkkjb6jiiafjsh5yovye.txt