| Item | SPF | XML | Change | Description |
|---|---|---|---|---|
| IFC2x3 to IFC4 | ||||
| IfcEventType | ADDED | |||
-------------------------------------------------------------------------------------------------------------
IfcEventType定义可以指定的特定事件类型。
IFC4中增加的新实体
IfcEventType提供可以指定的所有类型的事件。
IfcEventType的使用定义了一个或多个IfcEvent出现的参数。参数可以通过可以在IfcEventTypeEnum数据类型中枚举的属性集指定，也可以通过IfcEvent的显式属性指定。事件发生（IfcEvent实体）通过IfcRelDefinesByType关系链接到事件类型。
| # | Attribute | Type | Cardinality | Description | C |
|---|---|---|---|---|---|
| 10 | PredefinedType | IfcEventTypeEnum | [1:1] | Identifies the predefined types of an event from which the type required may be set. | X |
| 11 | EventTriggerType | IfcEventTriggerTypeEnum | [1:1] | Identifies the predefined types of event trigger from which the type required may be set. | X |
| 12 | UserDefinedEventTriggerType | IfcLabel | [0:1] | A user defined event trigger type, the value of which is asserted when the value of an event trigger type is declared as USERDEFINED. | X |
| Rule | Description |
|---|---|
| CorrectPredefinedType | The attribute ProcessType must be asserted when the value of PredefinedType is set to USERDEFINED. |
| CorrectEventTriggerType | The attribute UserDefinedEventTriggerType must be asserted when the value of EventTriggerType is set to USERDEFINED. |
| # | 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 | |
| IfcTypeProcess | |||||
| 7 | Identification | IfcIdentifier | [0:1] | An identifying designation given to a process type. | X |
| 8 | LongDescription | IfcText | [0:1] | An long description, or text, describing the activity in detail.
NOTE The inherited SELFIfcRoot.Description attribute is used as the short description. |
X |
| 9 | ProcessType | IfcLabel | [0:1] | The type denotes a particular type that indicates the process 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 |
| OperatesOn | IfcRelAssignsToProcess @RelatingProcess |
S[0:?] | Set of relationships to other objects, e.g. products, processes, controls, resources or actors that are operated on by the process type. | X | |
| IfcEventType | |||||
| 10 | PredefinedType | IfcEventTypeEnum | [1:1] | Identifies the predefined types of an event from which the type required may be set. | X |
| 11 | EventTriggerType | IfcEventTriggerTypeEnum | [1:1] | Identifies the predefined types of event trigger from which the type required may be set. | X |
| 12 | UserDefinedEventTriggerType | IfcLabel | [0:1] | A user defined event trigger type, the value of which is asserted when the value of an event trigger type is declared as USERDEFINED. | X |