Frank, I like the way you put this: On 1 Mar 2005, at 7:08, Frank Siebenlist wrote:
...but if we model the usage patterns with wsrf, and wsrf and ws-transfer are doing conceptually the same thing, isn't the ogsa-wg doing just that: it uses an abstraction that can be used to describe the relevant usage patterns without losing any generality.
I full agree. I think a very interesting study, for starters, would be to implement the WSRF Resource Properties interfaces (in other words - the OGSA Abstraction Layer for State Access) in terms of WS-Transfer. The reverse is already possible in WSRF-RP trough the GetResourcePropertyDocument (equivalent to the WS-Transfer GET). I'm sure the rest of the lowest OGSA abstraction layers maps to other infrastructures just as easily.
The idea of inventing "yet an other abstraction layer" doesn't sound very productive.
Agreed. But now that this lowest layer is well established, higher level services need to be constructed, e.g. for data access, job submission and management, .... These higher levels will be more isolated from the lower level details, but much simpler to construct given that these lower layers are in place. -- Take care: Dr. David Snelling < David . Snelling . UK . Fujitsu . com > Fujitsu Laboratories of Europe Hayes Park Central Hayes End Road Hayes, Middlesex UB4 8FE +44-208-606-4649 (Office) +44-208-606-4539 (Fax) +44-7768-807526 (Mobile)