[gin-info] Possible list of subset data for info interop

[Jennifer M. Schopf]

Thomas-

    this group is NOT defining a schema.  This group is deciding on a 
minimal set of attributes for everyone to advertise in their native schemas.

We will not have an NxN mapping - we will have a mapping of N schemas into 
one list of attributes. This space is also small - I believe we have only 3 
schemas for folks involved now, the GLUE schema, CIM, and what the 
nordu-grid guys have used, which should be close to the GLUE schema since 
it grew out of MDS2 originally.

  -j


At 05:39 02/03/2006, Thomas Soddemann wrote:
>Hi Erwin,
>
>are you aware that you are proposing to use a n^2 solution and diregarding 
>a linear scaling one with n being the number of schemas used?
>
>If we just try find that list of attributes and map all schema 
>representation onto each other we have a n^2 problem. Here every pair of 
>Grid projects will have to map their schemas on top of each other. -> n(n-1)
>If we use a minimum schema (whatever that will be) as the interface schema 
>representation for exchanging information we only deal with a linear 
>scaling problem, since each Grid project will have to map its own schema 
>to the interface one. -> n
>
>If we only had two schemas, e.g. Glue and CIM, the task was trivial, but 
>if I remember right, we have more than two.
>
>Cheers,
>Thomas
>
>Erwin Laure wrote:
>
>>Absolutely! It is always tempting in these efforts to start defining new 
>>things because obviously existing solutions have their deficiencies. But 
>>that's not the point for GIN. As Jen said, we should try to come up with 
>>a minimal set and try to build translators between different 
>>representations (Glue/CIM more specifically). That's all GIN should be doing.
>>
>>Hopefully, this work will lead to some insights that we can feed into 
>>standardization processes, or specifically for the information system, 
>>into glue2, but we are not defining it.
>>
>>Cheers,
>>
>>-- Erwin
>>
>
>
>


Dr. Jennifer M. Schopf
Scientist                              eInfrastructure Policy Advisor
Distributed Systems Lab       National eScience Centre and JISC
Argonne National Laboratory  The University of Edinburgh
jms at mcs.anl.gov                 jms at nesc.ac.uk
http://www.mcs.anl.gov/~jms http://homepages.nesc.ac.uk/~jms