Systems such as transaction processing systems, decision support systems, and workflow systems are all very helpful by the graphical structure. However, metagraph, new graphical structure developed in this book, beyond the representational and provides Information Systems with tools, powerful analytical modeling graphics. METAGRAPHS AND THEIR APPLICATIONS is metagraph presentation of theory and application that begins by defining metagraph and usage. In the second part of this book, four promising applications metagraphs tested: 1) modeling of data relationships, 2) modeling of decision models, 3) modeling of rule-making, and 4) modeling workflow task. Of special interest is the structure of the modeling process metagraphs, which can increase the body of work on systems analysis and design (including software engineering), development metagraphs desk to support these processes, and applications that are possible from the results presented here, according to an enhanced, to a social network.