The method of search is accomplished by dividing an input data into a plurality of sub-keys and each sub-key is used to search through the rule mapping table for determining a rule that is satisfied with the input data.

• 以资料範围来分类的资料库不群组方式可应用本发明的建表方式来建构资料库，和查表方式来查寻资料属于哪个群组。