DBObjectHandle - Database Object Handle

Database object handles are necessary for accessing data in an database object. A database object can be considered as a database within a database. Each database has a root database object on top. Below each database object any number of subordinated database objects can be created.

Database objects in a database are logically separated but not physically. Thus, it becomes possible to establish links between structure instances in different database objects. Each database object has, however, its own extents containing the global instances of the database object.

The database object handle for the root database object is part of the database handle (-> DatabaseHandle) and need not to be opened explicitly.

A database object handle is required for opening extent property handles for accessing structure instances stored in extents.

The database object handle administrates transactions. Transactions can be started and stopped for each object handle. The database object handle is not thread-save, i.e. a database object handle must not be used simultaneously in different threads.

The database object supports version slices, i.e. each database object may have its own current version.