[OSGeo-Discuss] Versioning of spatial data - Query

[Abhay]

Hello All,
I wish to know, is there any system other than ESRI ArcSDE that supports
versioning of GeoSpatial Data.

If so could anyone point me to a possible solution in opensource and apart
from write my own custom application/Workflow from scratch.

I have tried google for solution but am not able make or break any idea to
solve this, so with a confused mind I ask, could there be a possibility that
SVN or any version control system (application/mechanics/functionality) be
merged with PostgreSQL (Postgis) to create this solution.

Rgds.

Abhay.
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