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ifc4x3 IfcActuator

时间:2023-03-05 21:02:24浏览次数:49  
标签:SET Reference relationship object IfcActuator element ifc4x3 type

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

#AttributeTypeDescription
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.

  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.
  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.
  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.
  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.
  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.
  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.

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.
  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.
  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.
  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.
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.

  PositionedRelativeTo SET [0:?] OF IfcRelPositions FOR RelatedProducts

No description available.

  ReferencedInStructures SET [0:?] OF IfcRelReferencedInSpatialStructure FOR RelatedElements

No description available.

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.

  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.

  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.
  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.
  HasProjections SET [0:?] OF IfcRelProjectsElement FOR RelatingElement

Projection relationship that adds a feature (using a Boolean union) to the IfcBuildingElement.

  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.

  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.

  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.

  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.

  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.

  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.

  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.

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.
IfcDistributionControlElement (1)
  AssignedToFlowElement SET [0:1] OF IfcRelFlowControlElements FOR RelatedControlElements

Reference through the relationship object to related distribution flow elements.

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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标签:SET,Reference,relationship,object,IfcActuator,element,ifc4x3,type
From: https://www.cnblogs.com/herd/p/17168117.html

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