System. A logical entity that provides access to data and code physically stored in databases. References to database objects are made logically through namespaces rather than to physical database locations. Namespace mappings specify the database locations of globals so users and code need only make a simple reference to a global in a namespace, without having to be concerned with the physical location of the data it contains. For example, namespace mappings allow you to collect objects from multiple databases into a single namespace, which serves as a single frame of reference, as if they were all stored together.

For information on namespace names, see Configuring Namespaces.