IfcActionRequest
6.5.3.1.1语义定义
请求是要求某些东西的行为或实例，例如要求提供信息、提交标书或执行工作。
根据需要，请求可以采取多种形式，包括维修故障报告、小型工程请求和购买请求（通过服务台或购买功能提出）。
历史IFC2x2中的新实体。
IFC4-CHANGE属性RequestID重命名为Identification并升级为父类型IfcControl，添加了属性PredefinedType、Status和LongDescription。
6.5.3.1.2实体继承
6.5.3.1.3 Attributes
| # | Attribute | Type | Description |
|---|---|---|---|
| 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. |
|
| IfcControl (2) | |||
| 6 | Identification | OPTIONAL IfcIdentifier |
An identifying designation given to a control It is the identifier at the occurrence level. IFC4-CHANGE Attribute unified by promoting from various subtypes of IfcControl. |
| Controls | SET [0:?] OF IfcRelAssignsToControl FOR RelatingControl |
Reference to the relationship that associates the control to the object(s) being controlled. |
|
| Click to show 18 hidden inherited attributes Click to hide 18 inherited attributes | |||
| IfcActionRequest (3) | |||
| 7 | PredefinedType | OPTIONAL IfcActionRequestTypeEnum |
Identifies the predefined type of sources through which a request can be made. IFC4-CHANGE The attribute has been added. |
| 8 | Status | OPTIONAL IfcLabel |
The status currently assigned to the request. Possible values include: Hold: wait to see if further requests are received before deciding on action NoAction: no action is required on this request Schedule: plan action to take place as part of maintenance or other task planning/scheduling Urgent: take action immediately IFC4-CHANGE The attribute has been added. |
| 9 | LongDescription | OPTIONAL IfcText |
Detailed description of the permit. IFC4-CHANGE The attribute has been added. |
6.5.3.1.4 Property sets
- Pset_ActionRequest
- RequestSourceLabel
- RequestSourceName
- RequestComments
6.5.3.1.5 Concept usage
| Concept | Usage | Description | |
|---|---|---|---|
| IfcRoot (2) | |||
| Revision Control | General |
Ownership, history, and merge state is captured using IfcOwnerHistory. |
|
| Software Identity | General |
IfcRoot assigns the globally unique ID. In addition it may provide for a name and a description about the concept. |
|
| IfcObjectDefinition (9) | |||
| Aggregation | General |
No description available. |
|
| Approval Association | General |
No description available. |
|
| Classification Association | General |
Any object occurrence or object type can have a reference to a specific classification reference, i.e. to a particular facet within a classification system. |
|
| Constraint Association | General |
No description available. |
|
| Document Association | General |
No description available. |
|
| Library Association | General |
No description available. |
|
| Material Association | General |
No description available. |
|
| Material Single | General |
No description available. |
|
| Nesting | General |
No description available. |
|
| IfcObject (5) | |||
| Assignment to Group | General |
No description available. |
|
| Object Predefined Type | General |
No description available. |
|
| Object Typing | General |
Any object occurrence can be typed by being assigned to a common object type utilizing this concept. A particular rule, restricting the applicable subtypes of IfcTypeObject that can be assigned, is introduced by overriding this concept at the level of subtypes of IfcObject. This concept can be applied to the following resources: |
|
| Object User Identity | General |
An attribute Name and optionally Description can be used for all subypes of IfcObject. For those subtypes, that have an object type definition, such as ifcBeam - IfcBeamType, the common Name and optionally Description is associated with the object type. |
|
| Property Sets with Override | General |
Any object occurrence can hold property sets, either directly at the object occurrence as element specific property sets, or at the object type, as type property sets. In this case, the properties that are provided to the object occurrence are the combinations of element specific and type properties. In case, that the same property (within the same property set, is defined both, in occurrence and type properties, the property value of the occurrence property overrides the property value of the type property. |
|
| IfcControl (1) | |||
| Control Assignment | General |
Controls have assignments from products, processes, or other objects by using the relationship object IfcRelAssignsToControl. This concept can be applied to the following resources: |
|
| Click to show 17 hidden inherited concepts Click to hide 17 inherited concepts | |||
| IfcActionRequest (5) | |||
| Aggregation | General | This is a further elaboration on an inherited concept.
As shown in Figure 6.5.3.1.A, an IfcActionRequest may be aggregated into components. |
|
| Approval Association | General | This is a further elaboration on an inherited concept.
Approvals may be associated to indicate the status of acceptance or rejection using the IfcRelAssociatesApproval relationship where RelatingApproval refers to an IfcApproval and RelatedObjects contains the IfcActionRequest. Approvals may be split into sub-approvals using IfcApprovalRelationship to track approval status separately for each party where RelatingApproval refers to the higher-level approval and RelatedApprovals contains one or more lower-level approvals. The hierarchy of approvals implies sequencing such that a higher-level approval is not executed until all of its lower-level approvals have been accepted. |
|
| Control Assignment | General |
As shown in Figure 6.5.3.1.B, an IfcActionRequest may be assigned to the following entities using relationships as indicated:
The IfcActionRequest may have assignments of its own using the IfcRelAssignsToControl relationship where RelatingControl refers to the IfcActionRequest and RelatedObjects contains one or more objects of the following types:
This concept can be applied to the following resources: |
|
| Object Nesting | General |
This concept can be applied to the following resources:
|
|
| Property Sets for Objects | General |
This concept can be applied to the following resources: |
|
Table 6.5.3.1.D
6.5.3.1.6 Formal representation
ENTITY IfcActionRequest
SUBTYPE OF (IfcControl);
PredefinedType : OPTIONAL IfcActionRequestTypeEnum;
Status : OPTIONAL IfcLabel;
LongDescription : OPTIONAL IfcText;
END_ENTITY;6.5.3.1.7 References
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标签：relationship,object,IFC4,General,IfcActionRequest,type,CHANGE From： https://www.cnblogs.com/herd/p/17080935.html