Returns the value of RelatedObjects attribute. This attribute represents the object definitions, either non-product object occurrences or non-product object types, that are being nestes. They are defined as the parts in the ordered whole/part relationship -i.e. there is an implied order among the parts expressed by the position within the list of RelatedObjects.

Returns the value of RelatingObject attribute.

IFC4 CHANGE: The attribute has been demoted from the supertype IfcRelDecomposes and defines the ordered set of parts within the nest.