Abstract: The important products of the software product line domain-level and product level development periods domain design model and application design model, respectively. An automatic or semi automatic method is needed to keep synchronization between these two models during the life cycle of a software product line. Such a GroundTram- based method called SPI_Syn}GRound Tram was proposed in this paper. I}o keep synchronization between domain and application model, this method firstly converts this problem to a bidirectional transformation between two graphs, which is then solved gracefully by Ground Tram. The detailed process of this method was illustrated in this paper, and an on- lincshopping case model was used to show its effectiveness.

Key words: Software product line, Model synchronization, GroundTram