version 1.5
You can deactivate a context temporarily to make changes to it. For instance, you might want to deactivate a context to add or modify a clause in the context. To deactivate a context, you use the OD DEACTIVATE CONTEXT command.
When you are finished using a context, you can close the context. Closing a context frees the space previously used by the context definition in memory. A context that has been closed cannot be reactivated. To close a context, use the OD DROP CONTEXT command.
OD DROP CONTEXT deactivates the context if it has not already been deactivated. When you quit 4th Dimension, 4D for Oracle automatically closes all contexts.