The ``entity`` attribute must point to the ``other_entity`` of the container element established with ``relationship`` relationship
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Usages:
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 - **Then** *The PlacementRelTo attribute must point to the IfcLocalPlacement of the container element established with IfcRelAggregates relationship*

   :doc:`/features/OJP001_Relative-placement-for-elements-aggregated-to-another-element`:16