1. A method, comprising: performing text mining on a set of case reports in text format to determine a set of grammar rules to be used to determine whether case reports meet a medical condition, the text mining comprising performing feature selection, used to determine the set of grammar rules, that combines standardized case definitions with experience of medical officers for the medical condition, wherein performing feature selection further comprises: representing important keywords as features, the important keywords corresponding to the standardized case definitions for the medical condition and to information determined from the experience of medical officers for the medical condition; determining low level patterns having major and minor criteria that included one or more of the keywords; and creating high level patterns that comprise one or more of the major and minor criteria; and outputting the set of grammar rules.
1. A method, comprising: performing text mining on a set of case reports in text format to determine a set of grammar rules to be used to determine whether case reports meet a medical condition, the text mining comprising performing feature selection, used to determine the set of grammar rules, that combines standardized case definitions with experience of medical officers for the medical condition, wherein performing feature selection further comprises: representing important keywords as features, the important keywords corresponding to the standardized case definitions for the medical condition and to information determined from the experience of medical officers for the medical condition; determining low level patterns having major and minor criteria that included one or more of the keywords; and creating high level patterns that comprise one or more of the major and minor criteria; and outputting the set of grammar rules. 5. The method of claim 1 , wherein representing important keywords as features further comprises creating a list of lemmas to represent keywords of interest, and the method further comprises developing a lexicon for the medical condition and building a grammar based on the lexicon, wherein the building of the grammar forms the set of grammar rules.