turbo prep should allow copied dataset(s) in merging that would be able to "add to process".

kundeng

Is this a bug or just a feature not implemented? 
start with a process, run it, and feed the result to turbo prep;  call it dataset-1
Turbo prep allows copying a dataset and performs ETL on the copied dataset, call it dataset-2
perform join from dataset-1 to dataset-2,  seems to work too, except that 

you can't add the process back to the original process anymore.  


This should be easy to implement? I know the work-around is to retreive dataset-2 from repository, but there are many reasons why the above should work.