Database Management
Reference Manual
Introduction to Database Concepts
:
Primary Database Hierarchy
: Where the Primary Hierarchy is Used
Where the Primary Hierarchy is Used
The primary hierarchy is used as follows:
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It is used to create the 'constructed' name for unnamed elements.
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When an element is deleted, all descendants in the primary hierarchy are deleted.
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The COPY command will copy an element and all its primary descendants.
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Claiming elements relies on the primary hierarchy.
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Collections work on the primary hierarchy.
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Most commands assume that the action is to be performed on the given element and its descendants in its primary hierarchy, e.g. adding a ZONE to a 3D view will add everything below that ZONE.
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In the DESIGN DB, world positions and orientations are concatenated according to the primary hierarchy.
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