Morphological alterations of a search term have a negative impact on the recall performance of an information retrieval ( IR ) system ( Choueka , 1990 ; J Â¨ appinen and Niemist Â¨ o , 1988 ; Kraaij and Pohlmann , 1996 ) , since they preclude a direct match between the search term proper and its morphological variants in the documents to be retrieved .
viewing stemming as recall enhancement
W Kraaij R Pohlmann
Morphological alterations of a search term have a negative impact on the recall performance of an information retrieval ( IR ) system ( Choueka , 1990 ; J Â¨ appinen and Niemist Â¨ o , 1988 ; Kraaij and Pohlmann , 1996 ) , since they preclude a direct match between the search term proper and its morphological variants in the documents to be retrieved . In order to cope with such variation , morphological analysis is concerned with the reverse processing of inflection ( e.g. , ` search ed ' , ` search ing ' ) 1 , derivation ( e.g. , ` search er ' or ` search able ' ) and composition ( e.g. , German ` Blut hoch druck ' [ ` high blood pressure ' ] ) .
Morphological alterations of a search term have a negative impact on the recall performance of an information retrieval ( IR ) system ( Choueka , 1990 ; J Â¨ appinen and Niemist Â¨ o , 1988 ; @@CITATION ) , since they preclude a direct match between the search term proper and its morphological variants in the documents to be retrieved .