Methods and apparatus, including computer program products, implementing and using techniques for integrating and data activities in a process flow. A data transformation activity is invoked through local or remote invocation. The data transformation activity is part of a process flow defined in a standard business process execution language format and is invoked from within the process flow. A system for executing a process flow including one or more control activities and one or more data transformation activities is also described. The system includes a process control engine for executing activities included in the process flow, a data transformation subsystem for storing domain specific definitions of data transformation processes of data in one or more databases, and a control data repository for storing domain specific activity information related to the process flow.