Database Management
Reference Manual
Introduction to Database Concepts
:
Primary Database Hierarchy
: Element Instances
Element Instances
A new database starts with a single world element with name '/*'. Users will then create instances of other element types. For example, a system user might create an initial hierarchy of sites and zones in a MODEL DB, leaving it to other users to create the actual Plant items.
An element instance will always be created within the primary hierarchy. For example, a new ZONE element must be created under an existing SITE. It cannot be created as a 'freestanding' element outside the existing hierarchy.
The actual element hierarchy can be viewed with the AVEVA E3D™ explorer.
All element instances within an MDB are accessible at all times.
1974 to current year.
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