Database Workspace Manager.
The Oracle database can hold different versions of the same row in one or more
workspaces (read-consistent views).
Users of the database can then change these versions independently.
Subprocedures: AlterSavepoint CreateSavepoint DeleteSavepoint AlterWorkspace CreateWorkspace RemoveWorkspace RemoveWorkspaceTree BeginResolve CommitResolve CompressWorkspace CompressWorkspaceTree CopyForUpdate DisableVersioning EnableVersioning FreezeWorkspace GetConflictWorkspace Function GetDiffVersions Function GetLockMode Function GetMultiWorkspaces Function GetOpContext Function GetPrivs Function GetWorkspace Function GotoDate GotoSavepoint GotoWorkspace GrantSystemPriv GrantWorkspacePriv IsWorkspaceOccupied Function LockRows MergeTable MergeWorkspace RefreshTable RefreshWorkspace ResolveConflicts RevokeSystemPriv RevokeWorkspacePriv RollbackResolve RollbackTable RollbackToSP RollbackWorkspace SetConflictWorkspace SetDiffVersions SetLockingOFF SetLockingON SetMultiWorkspaces SetWoOverwriteOFF SetWoOverwriteON SetWorkspaceLockModeOFF SetWorkspaceLockModeON UnfreezeWorkspace UnlockRows
For full documentation of the packaged procedures
above see the Oracle Manual:
"Oracle9i Supplied PL/SQL Packages and Types Reference"
or the book Oracle Built in Packages
by Steven Feuerstein et al