kelvin goodson wrote:
[snip]


With regards to sharing change histories,  I imagine the primary use case
for change histories is when you give a give a modified graph back to the
"same" DAS for writing back to the original source. So I in terms of cross language interoperability I would extrapolate that the scenario we would be supporting would be that of fairly tightly coupled DAS implementations, all
accessing the same source.  I may be wrong, but It doesn't sound like a
frequently encountered scenario, so whilst it sounds like goodness, it
wouldn't be at the top of my priority list.

[snip]

I have also not seen many interop scenarios requiring cooperation between two different DAS implementations. The only one that comes to mind is reading from one database and writing to another. This would be very cool, especially if the two DAS implementations were in different languages(C++, Java, PHP, Ruby), but I doubt that this scenario will be common.

I think a more frequent interop scenario will involve reading data from a data source and shipping it to some remote engine for processing. The modified graph would be shipped back to the originating DAS and the changes reflected to the originating data source. The remote engine could be implemented in another language or, if it is the same language, it could be using a different implementation of SDO.

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