Workspace Manager

Spatial applications often have the need to work with multiple versions of the data, for example, a city planning application might provide design choices for adding new sub-divisions to the city. At the same time, a reviewer should be able to look at all the possible designs and choose the best design. This requires access to multiple versions of the data. Some of the common reasons for multiversioning of data are concurrency (multiple users working on different designs), history, and what-if scenario creation. The concurrency here is different from the concurrency provided by the database. Another requirement is to keep the changes available beyond the lifetime of the database transaction, especially for what-if scenarios, for example, with the database transaction model, one application user cannot make changes and make them visible to some other users without committing the changes so that they are visible to all the users on the database. This concept is called a long...