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For example: | Kidney stone | and | Renal calculus | are synonymous Descriptions in SNOMED CT. However, a search of SNOMED CT for the target phrase "kidney stone fragmentation" yields the result | Percutaneous nephrostomy with fragmentation of kidney stone | while a search for "Renal stone fragmentation" yields no results. One way of addressing this problem is to maintain a table of word equivalents, and a table of this type is a prerequisite for exhaustive synonym generation. The Word Equivalent Table is included in the Developer Toolkit of SNOMED CT. [see SNOMED CT Developer Toolkit Guide]. Individual can be found in the Lexical Resources folder, which is available from the Technical Resources in the Document Library. Individual implementers will wish to add additional word equivalents to meet the requirements of their particular medical specialty or user needs. The resulting table then acts as an additional resource to assist searching and parsing of phrases. It need not be a comprehensive dictionary of words.

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