The PGI input suggests to introduce hold points in order to manually move files 
to/from the job. This is an implementation hint, an as such the two issues must 
be disentangled. Necessity of having hold points in job description needs to be 
clarified, and feasibility discussed.

The PGI input requires extensions to allow manual transfer of files to/from the 
job. It also makes an implementation suggestion thatthis will require hold 
points. The two issues must be disentangled, and manual staging extension should
 be formalised independently of implementation possibilities.