ifc4x3 IfcActuator
ifc4x3 IfcActuator
1语义定义
致动器是用于移动或控制机构或系统的机械装置。致动器吸收通常由空气、电或液体产生的能量,并将其转换成某种运动。
IFC4中的新实体
2实体继承
3属性
# | Attribute | Type | Description |
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IfcRoot (4) | |||
1 | GlobalId | IfcGloballyUniqueId |
Assignment of a globally unique identifier within the entire software world. |
2 | OwnerHistory | OPTIONAL IfcOwnerHistory |
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.IFC4-CHANGE The attribute has been changed to be OPTIONAL. |
3 | Name | OPTIONAL IfcLabel |
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. |
4 | Description | OPTIONAL IfcText |
Optional description, provided for exchanging informative comments. |
IfcObjectDefinition (7) | |||
HasAssignments | SET [0:?] OF IfcRelAssigns FOR RelatedObjects |
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. |
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Nests | SET [0:1] OF IfcRelNests FOR RelatedObjects |
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). IFC4-CHANGE The inverse attribute datatype has been added and separated from Decomposes defined at IfcObjectDefinition. |
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IsNestedBy | SET [0:?] OF IfcRelNests FOR RelatingObject |
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). IFC4-CHANGE The inverse attribute datatype has been added and separated from IsDecomposedBy defined at IfcObjectDefinition. |
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HasContext | SET [0:1] OF IfcRelDeclares FOR RelatedDefinitions |
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. IFC4-CHANGE The inverse attribute datatype has been added. |
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IsDecomposedBy | SET [0:?] OF IfcRelAggregates FOR RelatingObject |
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). IFC4-CHANGE The inverse attribute datatype has been changed from the supertype IfcRelDecomposes to subtype IfcRelAggregates. |
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Decomposes | SET [0:1] OF IfcRelAggregates FOR RelatedObjects |
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). IFC4-CHANGE The inverse attribute datatype has been changed from the supertype IfcRelDecomposes to subtype IfcRelAggregates. |
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HasAssociations | SET [0:?] OF IfcRelAssociates FOR RelatedObjects |
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. |
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IfcObject (5) | |||
5 | ObjectType | OPTIONAL IfcLabel |
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. |
IsDeclaredBy | SET [0:1] OF IfcRelDefinesByObject FOR RelatedObjects |
Link to the relationship object pointing to the declaring object that provides the object definitions for this object occurrence. The declaring object has to be part of an object type decomposition. The associated IfcObject, or its subtypes, contains the specific information (as part of a type, or style, definition), that is common to all reflected instances of the declaring IfcObject, or its subtypes. IFC4-CHANGE New inverse relationship, change made with upward compatibility for file based exchange. |
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Declares | SET [0:?] OF IfcRelDefinesByObject FOR RelatingObject |
Link to the relationship object pointing to the reflected object(s) that receives the object definitions. The reflected object has to be part of an object occurrence decomposition. The associated IfcObject, or its subtypes, provides the specific information (as part of a type, or style, definition), that is common to all reflected instances of the declaring IfcObject, or its subtypes. IFC4-CHANGE New inverse relationship, change made with upward compatibility for file based exchange. |
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IsTypedBy | SET [0:1] OF IfcRelDefinesByType FOR RelatedObjects |
Set of relationships to the object type that provides the type definitions for this object occurrence. The then associated IfcTypeObject, or its subtypes, contains the specific information (or type, or style), that is common to all instances of IfcObject, or its subtypes, referring to the same type. IFC4-CHANGE New inverse relationship, the link to IfcRelDefinesByType had previously be included in the inverse relationship IfcRelDefines. Change made with upward compatibility for file based exchange. |
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IsDefinedBy | SET [0:?] OF IfcRelDefinesByProperties FOR RelatedObjects |
Set of relationships to property set definitions attached to this object. Those statically or dynamically defined properties contain alphanumeric information content that further defines the object. IFC4-CHANGE The data type has been changed from IfcRelDefines to IfcRelDefinesByProperties with upward compatibility for file based exchange. |
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IfcProduct (5) | |||
6 | ObjectPlacement | OPTIONAL IfcObjectPlacement |
This establishes the object coordinate system and placement of the product in space. The placement can either be absolute (relative to the world coordinate system), relative (relative to the object placement of another product), or constrained (e.g. relative to grid axes, or to a linear positioning element). The type of placement is determined by the various subtypes of IfcObjectPlacement. An object placement must be provided if a representation is present. |
7 | Representation | OPTIONAL IfcProductRepresentation |
Reference to the representations of the product, being either a representation (IfcProductRepresentation) or as a special case a shape representations (IfcProductDefinitionShape). The product definition shape provides for multiple geometric representations of the shape property of the object within the same object coordinate system, defined by the object placement. |
ReferencedBy | SET [0:?] OF IfcRelAssignsToProduct FOR RelatingProduct |
Reference to the IfcRelAssignsToProduct relationship, by which other products, processes, controls, resources or actors (as subtypes of IfcObjectDefinition) can be related to this product. |
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PositionedRelativeTo | SET [0:?] OF IfcRelPositions FOR RelatedProducts |
No description available. |
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ReferencedInStructures | SET [0:?] OF IfcRelReferencedInSpatialStructure FOR RelatedElements |
No description available. |
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IfcElement (13) | |||
8 | Tag | OPTIONAL IfcIdentifier |
The tag (or label) identifier at the particular instance of a product, e.g. the serial number, or the position number. It is the identifier at the occurrence level. |
FillsVoids | SET [0:1] OF IfcRelFillsElement FOR RelatedBuildingElement |
Reference to the IfcRelFillsElement Relationship that puts the element as a filling into the opening created within another element. |
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ConnectedTo | SET [0:?] OF IfcRelConnectsElements FOR RelatingElement |
Reference to the element connection relationship. The relationship then refers to the other element to which this element is connected to. |
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IsInterferedByElements | SET [0:?] OF IfcRelInterferesElements FOR RelatedElement |
Reference to the interference relationship to indicate the element that is interfered. The relationship, if provided, indicates that this element has an interference with one or many other elements. NOTE There is no indication of precedence between IsInterferedByElements and InterferesElements.IFC4-CHANGE New inverse relationship. |
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InterferesElements | SET [0:?] OF IfcRelInterferesElements FOR RelatingElement |
Reference to the interference relationship to indicate the element that interferes. The relationship, if provided, indicates that this element has an interference with one or many other elements. NOTE There is no indication of precedence between IsInterferedByElements and InterferesElements.IFC4-CHANGE New inverse relationship. |
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HasProjections | SET [0:?] OF IfcRelProjectsElement FOR RelatingElement |
Projection relationship that adds a feature (using a Boolean union) to the IfcBuildingElement. |
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HasOpenings | SET [0:?] OF IfcRelVoidsElement FOR RelatingBuildingElement |
Reference to the IfcRelVoidsElement relationship that creates an opening in an element. An element can incorporate zero-to-many openings. For each opening, that voids the element, a new relationship IfcRelVoidsElement is generated. |
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IsConnectionRealization | SET [0:?] OF IfcRelConnectsWithRealizingElements FOR RealizingElements |
Reference to the connection relationship with realizing element. The relationship, if provided, assigns this element as the realizing element to the connection, which provides the physical manifestation of the connection relationship. |
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ProvidesBoundaries | SET [0:?] OF IfcRelSpaceBoundary FOR RelatedBuildingElement |
Reference to space boundaries by virtue of the objectified relationship IfcRelSpaceBoundary. It defines the concept of an element bounding spaces. |
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ConnectedFrom | SET [0:?] OF IfcRelConnectsElements FOR RelatedElement |
Reference to the element connection relationship. The relationship then refers to the other element that is connected to this element. |
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ContainedInStructure | SET [0:1] OF IfcRelContainedInSpatialStructure FOR RelatedElements |
Containment relationship to the spatial structure element, to which the element is primarily associated. This containment relationship has to be hierarchical, i.e. an element may only be assigned directly to zero or one spatial structure. |
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HasCoverings | SET [0:?] OF IfcRelCoversBldgElements FOR RelatingBuildingElement |
Reference to IfcCovering by virtue of the objectified relationship IfcRelCoversBldgElement. It defines the concept of an element having coverings associated. |
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HasSurfaceFeatures | SET [0:?] OF IfcRelAdheresToElement FOR RelatingElement |
Reference to the IfcRelAdheresToElement relationship that adheres a IfcSurfaceFeature to an element. An element can incorporate zero-to-many surface features in one relationship. |
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IfcDistributionElement (1) | |||
HasPorts | SET [0:?] OF IfcRelConnectsPortToElement FOR RelatedElement |
Reference to the element to port connection relationship. The relationship then refers to the port which is contained in this element. IFC4-CHANGE The inverse attribute is deprecated. Relationship to ports, contained within the IfcDistributionElement is now realized by the inverse relationship NestedBy referencing IfcRelNests. |
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IfcDistributionControlElement (1) | |||
AssignedToFlowElement | SET [0:1] OF IfcRelFlowControlElements FOR RelatedControlElements |
Reference through the relationship object to related distribution flow elements. |
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Click to show 36 hidden inherited attributes Click to hide 36 inherited attributes | |||
IfcActuator (1) | |||
9 | PredefinedType | OPTIONAL IfcActuatorTypeEnum |
A list of types to further identify the object. Some property sets may be specifically applicable to one of these types. NOTE If the object has an associated IfcTypeObject with a PredefinedType, then this attribute shall not be used. |
ENTITY IfcActuator SUBTYPE OF (IfcDistributionControlElement); PredefinedType : OPTIONAL IfcActuatorTypeEnum; WHERE CorrectPredefinedType : NOT(EXISTS(PredefinedType)) OR (PredefinedType <> IfcActuatorTypeEnum.USERDEFINED) OR ((PredefinedType = IfcActuatorTypeEnum.USERDEFINED) AND EXISTS (SELF\IfcObject.ObjectType)); CorrectTypeAssigned : (SIZEOF(IsTypedBy) = 0) OR ('IFC4X3.IFCACTUATORTYPE' IN TYPEOF(SELF\IfcObject.IsTypedBy[1].RelatingType)); END_ENTITY;
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