OptionalinheritOptionalquantityHow quantityName reads.
OptionalsetHow setName reads.
Optionalvalue'si': the rule's numeric operand is in SI base units (metres, square
metres, cubic metres), the way IDS states measure values. Each value is
converted to SI with its own unit (an explicit Unit on the property or
quantity, else the project unit for its measure type) before comparing.
Values with no unit (labels, counts) are compared as stored. Absent:
the operand is in the model's own units (#5225).
Where a missing value may come from (#5433).
'type': a quantity also reads its type's quantity sets (properties always read their type's property sets).'aggregation': an element with no value of its own (its type's included, for quantities too) takes the nearestIfcRelAggregatesancestor's. Never implicit: absent means the element's own (and, for properties, its type's) values only.