The Internet has become a very successful platform for
exchanging messages owing to its ease of use. Now, a rapid
increasing amount of commercial trading is being undertaken
on the Internet. In today's e-commerce system, as the amount
of available information has rapidly increased, customers
have wasted much time in searching and browsing various
web sites to obtain the required product information. A buyer
is still responsible for collecting and interpreting information
on products, making decisions about products, negotiating
prices with the supplier, and handling purchases and
payments. A supplier frequently posts product information
on web sites to promote sales. Under these conditions, users
apply product categories and navigating interfaces to search
for products for matching purposes among suppliers and
buyers, thus, provide efficiency communication between
suppliers and buyers over the network is important