boundary between DAS and SDO Java implementation

["Coller, Shmuel" <Sh...@softwareag.com>]

It is not clear to me if Tuscany implementation for SDO  has a well
defined boundary where one can plug a self written DAS.

I am interested to learn this issue also at the level of SDO specs by
Oasis TC .

For example - are there Java interfaces that a DAS should implement so
that a DAS can  serve alongside (and reuse) an available  SDO
implementation ?

Shmuel Coller