Disclosed are embodiments of an interface structure and a method for automated data mining of a legacy system. A GUI is employed to navigate through the legacy system interface application and access a data field. Once the data field is displayed, the GUI can receive a tag from the user labeling the data field. Additionally, a screen tracing device can trace the sequence of events that ultimately results in the data field being displayed. The traced sequence and its corresponding tag are then stored in a data storage device. These processes can be repeated for multiple different data fields. Subsequently, a sequence applying device can retrieve one or more previously stored sequences in response to a request referencing the corresponding tag(s) and can apply the sequence(s) in order to access, for processing, data from the corresponding data field(s).