A system can comprise a device processor and a memory coupled to the device processor and configured to provide the processor with instructions to: receive a request from a first caller to invoke a software service; automatically obtain an input data mapping expression that is based on a first context tree of a first data model, and based on a current context during execution; evaluate the input data mapping expression to map input data from a first caller context to a service context of the software service; place the mapped input data into a service data consumer object for use by the software service; and invoke the software service to process the mapped input data.