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A system user enters the search string "Fragmentation of renal calculus;" the search returns no results. The search application that the user has been provided with has the option to extend the search by using the word equivalents table.
Step 1:
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The user selects this option (or it is invoked automatically because the initial search without word equivalents found nothing) and searches again using the same search string. The table is used to make substitutions in the search string to produce all possible unique search variants:
"Fragmentation of renal calculus"
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These 8 search variants are used as the target phrases for the searches. The search results of these variants are combined, duplicate Concepts are eliminated and the list of search results is returned.
Step 2:
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