Data Lineage Diagramming

[martinjsharp]

I am looking for examples of Data Lineage Diagrams. For example an Application may generate two datasets. These are passed to a second application which combines them and creates a new dataset which is passed to another Application  etc. There are other use cases where an application just passed a Dataset to another unchanged, but it may extract some data.  This would mean I need two duplicate a Dataset to appear more than once on a diagram, which is not permitted. I don't want to virtualise the connector end as this is very difficult to control. I don't want to create a copy, as it is exactly the same dataset.  I want to duplicate the same element on the diagram such that changing one changes the other.
Any ideas on either or both.