Embodiments of the invention allow structured data to be transferred between a source application and target applications that process structured data in different formats. For example, structured data may have associated rules which transform the structured data based on some variables. The source application may register variable definitions for each variable in a registry. Each target application may read the registry and register values for the variables. Once values are registered, the source application transfers the structured data to a transformation engine that applies the rules, using the registered values for the variables, to transform the structured data into a format compatible with the target applications. The transformation engine may also determine distinct sets of variable values and transform structured data based on each distinct set. In doing so, the number of transformed data generated is limited to the number of distinct sets, thereby avoiding generating duplicate transformed data.