Recently, many corporates have started 1 to 1 marketing in internet. It is most important in 1 to 1 marketing to find customer's need. For this, an analyzers carry out the web log analysis which is based the web log that is recorded when customers require any information to web server.
However because a web log is designed for management of homepage, it is difficult to analysis the web log directly, then an analyzers must operate preprocessing for the analysis of customer's need.
So the preprocessor with screening and mapping table is proposed. Screening means sifting duplicated information and mapping table is used to transform URL into subject concerned by corporate.
