IfcDistributionControlElementType
实体定义
元素类型IFCDDistributionControlElementType定义了元素的常用共享属性集定义列表和产品表示的可选集。它用于定义元素规范（该产品类型的所有实例所共有的特定产品信息）。
可以交换分布控制元素类型（或可实例化子类型），而无需将其指定给引用。
IfcDistributionControlElement类型的出现由IfcDistributionControlElement或其子类型的实例表示。
IFC2x2中的新实体。
现在可以使用IfcRelNests定义IFC4更改端口，以便在类型定义中启用端口定义（向前和向后兼容），提供逻辑顺序，并减少所需的关系对象数量。在引用对象上仍然支持IfcRelConnectsPortToElement关系，但是现在特定于动态连接的端口。
| # | Attribute | Type | Cardinality | Description | C |
|---|---|---|---|---|---|
| IfcRoot | |||||
| 1 | GlobalId | IfcGloballyUniqueId | [1:1] | Assignment of a globally unique identifier within the entire software world. | X |
| 2 | OwnerHistory | IfcOwnerHistory | [0:1] | Assignment of the information about the current ownership of that object, including owning actor, application, local identification and information captured about the recent changes of the object,
NOTE only the last modification in stored - either as addition, deletion or modification. |
X |
| 3 | Name | IfcLabel | [0:1] | Optional name for use by the participating software systems or users. For some subtypes of IfcRoot the insertion of the Name attribute may be required. This would be enforced by a where rule. | X |
| 4 | Description | IfcText | [0:1] | Optional description, provided for exchanging informative comments. | X |
| IfcObjectDefinition | |||||
| HasAssignments |
IfcRelAssigns @RelatedObjects |
S[0:?] | Reference to the relationship objects, that assign (by an association relationship) other subtypes of IfcObject to this object instance. Examples are the association to products, processes, controls, resources or groups. | X | |
| Nests |
IfcRelNests @RelatedObjects |
S[0:1] | References to the decomposition relationship being a nesting. It determines that this object definition is a part within an ordered whole/part decomposition relationship. An object occurrence or type can only be part of a single decomposition (to allow hierarchical strutures only). | X | |
| IsNestedBy |
IfcRelNests @RelatingObject |
S[0:?] | References to the decomposition relationship being a nesting. It determines that this object definition is the whole within an ordered whole/part decomposition relationship. An object or object type can be nested by several other objects (occurrences or types). | X | |
| HasContext |
IfcRelDeclares @RelatedDefinitions |
S[0:1] | References to the context providing context information such as project unit or representation context. It should only be asserted for the uppermost non-spatial object. | X | |
| IsDecomposedBy |
IfcRelAggregates @RelatingObject |
S[0:?] | References to the decomposition relationship being an aggregation. It determines that this object definition is whole within an unordered whole/part decomposition relationship. An object definitions can be aggregated by several other objects (occurrences or parts). | X | |
| Decomposes |
IfcRelAggregates @RelatedObjects |
S[0:1] | References to the decomposition relationship being an aggregation. It determines that this object definition is a part within an unordered whole/part decomposition relationship. An object definitions can only be part of a single decomposition (to allow hierarchical strutures only). | X | |
| HasAssociations |
IfcRelAssociates @RelatedObjects |
S[0:?] | Reference to the relationship objects, that associates external references or other resource definitions to the object.. Examples are the association to library, documentation or classification. | X | |
| IfcTypeObject | |||||
| 5 | ApplicableOccurrence | IfcIdentifier | [0:1] | The attribute optionally defines the data type of the occurrence object, to which the assigned type object can relate. If not present, no instruction is given to which occurrence object the type object is applicable. The following conventions are used:
EXAMPLE Refering to a furniture as applicable occurrence entity would be expressed as 'IfcFurnishingElement', refering to a brace as applicable entity would be expressed as 'IfcMember/BRACE', refering to a wall and wall standard case would be expressed as 'IfcWall, IfcWallStandardCase'. |
X |
| 6 | HasPropertySets | IfcPropertySetDefinition | S[1:?] | Set list of unique property sets, that are associated with the object type and are common to all object occurrences referring to this object type. | X |
| Types |
IfcRelDefinesByType @RelatingType |
S[0:1] | Reference to the relationship IfcRelDefinedByType and thus to those occurrence objects, which are defined by this type. | X | |
| IfcTypeProduct | |||||
| 7 | RepresentationMaps | IfcRepresentationMap | ~L[1:?] | List of unique representation maps. Each representation map describes a block definition of the shape of the product style. By providing more than one representation map, a multi-view block definition can be given. | X |
| 8 | Tag | IfcLabel | [0:1] | The tag (or label) identifier at the particular type of a product, e.g. the article number (like the EAN). It is the identifier at the specific level. | X |
| ReferencedBy |
IfcRelAssignsToProduct @RelatingProduct |
S[0:?] | Reference to the IfcRelAssignsToProduct relationship, by which other products, processes, controls, resources or actors (as subtypes of IfcObjectDefinition) can be related to this product type. | X | |
| IfcElementType | |||||
| 9 | ElementType | IfcLabel | [0:1] | The type denotes a particular type that indicates the object further. The use has to be established at the level of instantiable subtypes. In particular it holds the user defined type, if the enumeration of the attribute 'PredefinedType' is set to USERDEFINED. | X |
| IfcDistributionElementType | |||||
| IfcDistributionControlElementType | |||||
EXPRESS Specification
ENTITY IfcDistributionControlElementType ABSTRACT SUPERTYPE OF(ONEOF(IfcActuatorType, IfcAlarmType, IfcControllerType, IfcFlowInstrumentType, IfcProtectiveDeviceTrippingUnitType, IfcSensorType, IfcUnitaryControlElementType)) SUBTYPE OF (IfcDistributionElementType); END_ENTITY;
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