A system and method for transacting data using meta-models to express data relationships is provided. In some embodiments, the method comprises requesting, from a computing system, a meta-model expressing a data relationship. The data relationship relates to a topology of a deployed computing system, and the requesting specifies the meta-model from among a plurality of data models stored within the computing system. The requested meta-model is received from the computing system, and at least a portion of the meta-model is provided to an application. A data transaction based on the meta-model is received from the application and issued. In some such embodiments, a navigational interface is provided in order to navigate the meta-model and specify the portion to provide.