12)     How ambitious is the scope of a Usage Record? For job accounting it’s likely to be successful.  However the current extensibility mechanism and pre-defined fields, I suspect, will make life very difficult to try to capture a Usage Record for a database resource or file store (whatever form they may take…)

Evaluation: Non-compute resource consumption is addressed in earlier comments.

16)     The document seems addresses the usage of raw compute facilities when running  a computation.  Can it also handle the case where the resource provided is  raw storage, perhaps with various levels of QoS.  See e.g. the SRM work of  the GSM WG. 

Evaluation: Already addressed in non-compute discussions.