A6strud -As one of the next jumps in the computing environments, software on demand service becomes more popuIar. It means that users don't have to worry about installation and upgrade of software. One important method of software on demand services is s o h a r e streaming. Many products for software streaming is already on sale in the software market Until these days, however, associating and streaming the mixture of sohare and multimedia data have not been researched yet. In this paper, we call streaming data mixed with software and multimedia data as unijed streaming data. Then, we define synchronization of unified streaming data and model it based on graph notation. Also, we pmpose some examples to use this model to be soIved in the future.K~o o r d son demand, synchronization. Software streaming, unified streaming