Current Element and Current List Position

How AVEVA E3D™ data is stored explained the principles of database structures and the concept of owners and members.

When you are working in any database, AVEVA E3D™ always considers you to be located at a specific element in that database, which is known as the Current Element (CE).

The Member List of any element comprises a list of pointers to those elements directly below it in the database hierarchy; that is, to those elements which it owns. These pointers have a definite order, identified by numbered positions in the list. In addition to being notionally at the CE, AVEVA E3D™ also considers you to be at a specific pointer, which is known as the Current List Position.

As you move about within a database, the current element and current list position are continuously updated so that AVEVA E3D™ always knows where you are. As soon as you access a new element, this becomes the CE.

To view the current element and its member list at any time, simply click the box next to the desired current element in the Model Explorer (see Model Explorer). The members of the current element will be shown.

Alternatively, give the commands: