Collaborative commerce (c-commerce), which offers many levels of coordination, collaborative interactions and cooperation among or within organizations, can be regarded as the next evolutionary step beyond the more basic process of electronic commerce (e-commerce). So it is imperative to harness all organizations' information and applications into a computer-based framework in order to provide personalized access to all participants in a given community. This paper presents a knowledge-sharing model which can realize sharing of information and knowledge in a given community.