|Ensemble de quantités|
|frei definierbare Mengenliste|
IfcQuantitySet is the the abstract supertype for all
quantity sets attached to objects. The quantity set is a
container class that holds the individual quantities within a
quantity tree. These quantities are interpreted according to
their name attribute and classified according to theie
The same IfcQuantitySet can be assignd to multiple
object occurrences, it should then be assigned by a single
instance of IfcRelDefinedByProperties to a set of
related objects. Those quantity sets are referred to as
shared shared sets. It can also be assigned to an object
An IfcPropertySetTemplate may define the underlying
structure, i.e. the required name, the applicable object or
object types to which the quantity set can be attached, and
the individual quantities that maybe included.
HISTORY New entity in IFC4.
Relationship use definition
Quantity sets are related to other objects by using the
relationship object that refers to the corresponding object:
IfcRelDefinesByProperties using the inverse
Type Object: using a direct link by inverse
IfcRelDefinesByTemplate using the inverse
External reference: subtypes of
IfcRelAssociates are used to provide a link to a
classification system, or external library providing
further reference to the quantity set. Accessible by
inverse attribute HasAssociations.
Attribute use definition
Instances of IfcQuantitySet are used to assign named
sets of individual quantities (complex or single quantities).
Each individual quantity has a significant name string. Some
quantity sets are included in the IFC specification and have
a predefined set of quantities indicated by assigning a
significant name. These quantity sets are listed under
"quantity sets" main menu item within this specification and
in the object documentation sheet for those object to which
they are applicable.
XSD Specification: <xs:element name="IfcQuantitySet" type="ifc:IfcQuantitySet" abstract="true" substitutionGroup="ifc:IfcPropertySetDefinition" nillable="true"/>
<xs:complexType name="IfcQuantitySet" abstract="true">
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