Modern infrastructures are defined by spatially distributed network structures, concurrent subsystem-level behaviors, distributed control and decision making, and interdependencies among subsystems that are not always well understood. This work presents a model of system-level interactions that simulates distributed system behaviors through the use of ontologies, rules checking, and message passing mechanisms. We take initial steps toward the behavior modeling of large-scale urban networks as collections of networks that interact via many-to-many association relationships. We conclude with ideas for scaling up the simulations with mediators assembled from Apache Camel technology.