Synonyms and Homonyms Synonyms E.g.,document:"motorcycle repair",query:"motorcycle maintenance" ,Need to realize that“maintenance”and“repair”are synonyms System can extend query as"motorcycle and(repair or maintenance)” Homonyms E.g.,"object"has different meanings as noun/verb Can disambiguate meanings(to some extent)from the context Extending queries automatically using synonyms can be problematic Need to understand intended meaning in order to infer synonyms Or verify synonyms with user Synonyms may have other meanings as well Database System Concepts-6th Edition 21.12 @Silberschatz,Korth and SudarshanDatabase System Concepts - 6 21.12 ©Silberschatz, Korth and Sudarshan th Edition Synonyms and Homonyms Synonyms E.g., document: “motorcycle repair”, query: “motorcycle maintenance”  Need to realize that “maintenance” and “repair” are synonyms System can extend query as “motorcycle and (repair or maintenance)” Homonyms E.g., “object” has different meanings as noun/verb Can disambiguate meanings (to some extent) from the context Extending queries automatically using synonyms can be problematic Need to understand intended meaning in order to infer synonyms  Or verify synonyms with user Synonyms may have other meanings as well