Activity diagram is basically a flow chart to represent the flow from one activity to another activity. The activity can be described as an operation of the system.
So the control flow is drawn from one operation to another. This flow can be sequential, branched, or concurrent. Activity diagrams deal with all types of flow control by using different elements like a fork, join, etc.
Data integration is the combination of technical and business processes used to combine data from disparate sources into meaningful and valuable information. A complete data integration solution delivers trusted data from a variety of sources.