Enables the Domain Administrator to select a <unit> for defining naming conventions. The dialog box displays all the available plant hierarchy items that exist in the
source domain, or in the source project if the domain type is Owner operator or EPC-Project Mode. The software displays the plant hierarchy items as defined in the Plant Hierarchy Explorer. You can expand and collapse the hierarchy by clicking 
or 
beside the icons or by double-clicking the icons in the display.
The following icons indicate one example of various hierarchy levels:
— Domain
— Project or As-Built (available only when the domain type is Owner operator or EPC-Project Mode)
— <Plant>
— <Area>
— <Unit>