8.11.2.38 IfcLabel（标签）
8.11.2.38.1 语义定义（Semantic definition）
标签是指代某事物的术语。它是一个字符串，代表某事物可供人类解读的名称，并应具有自然语言含义。
类型：最多 255 个字符的字符串
值限制
作为用于命名目的的人类可读字符串，标签通常由人工指定且依赖于区域设置（与纯机器可读标识符 IfcIdentifier 相对）。
8.11.2.38.2 形式化表示（Formal representation）
TYPE IfcLabel = STRING(255);
END_TYPE;8.11.2.38.3 参考文献
- IfcActionRequest
- IfcActorRole
- IfcAddress
- IfcAlignmentParameterSegment
- IfcApplication
- IfcAppliedValue
- IfcApproval
- IfcBoundaryCondition
- IfcBoxAlignment
- IfcBuildingSystem
- IfcBuiltSystem
- IfcCartesianPointList2D
- IfcCartesianPointList3D
- IfcClassification
- IfcColourSpecification
- IfcComplexPropertyTemplate
- IfcCompositeProfileDef
- IfcConstraint
- IfcContext
- IfcContextDependentUnit
- IfcConversionBasedUnit
- IfcCoordinateReferenceSystem
- IfcCostSchedule
- IfcCurveStyleFont
- IfcCurveStyleFontAndScaling
- IfcDerivedProfileDef
- IfcDerivedUnit
- IfcDistributionSystem
- IfcDocumentInformation
- IfcDocumentInformationRelationship
- IfcDoor
- IfcDoorType
- IfcElementQuantity
- IfcElementType
- IfcEvent
- IfcEventType
- IfcExternalReference
- IfcGeometricRepresentationSubContext
- IfcGridAxis
- IfcLibraryInformation
- IfcLightSource
- IfcMaterial
- IfcMaterialConstituent
- IfcMaterialConstituentSet
- IfcMaterialLayer
- IfcMaterialLayerSet
- IfcMaterialProfile
- IfcMaterialProfileSet
- IfcMaterialRelationship
- IfcMetric
- IfcMonetaryUnit
- IfcObject
- IfcObjective
- IfcOffsetCurveByDistances
- IfcOpenCrossProfileDef
- IfcOrganization
- IfcPerformanceHistory
- IfcPermit
- IfcPerson
- IfcPhysicalComplexQuantity
- IfcPhysicalQuantity
- IfcPostalAddress
- IfcPreDefinedItem
- IfcPresentationLayerAssignment
- IfcPresentationStyle
- IfcProductRepresentation
- IfcProfileDef
- IfcProjectOrder
- IfcPropertyEnumeration
- IfcQuantityArea
- IfcQuantityCount
- IfcQuantityLength
- IfcQuantityNumber
- IfcQuantityTime
- IfcQuantityVolume
- IfcQuantityWeight
- IfcReference
- IfcReinforcementBarProperties
- IfcReinforcementDefinitionProperties
- IfcReinforcingBarType
- IfcReinforcingElement
- IfcReinforcingMeshType
- IfcRelAssociatesConstraint
- IfcRelConnectsWithRealizingElements
- IfcRelSequence
- IfcRepresentation
- IfcRepresentationContext
- IfcResourceLevelRelationship
- IfcResourceTime
- IfcRoot
- IfcSchedulingTime
- IfcShapeAspect
- IfcShapeRepresentationTypes
- IfcSimplePropertyTemplate
- IfcSimpleValue
- IfcSite
- IfcSpaceType
- IfcSpatialElement
- IfcSpatialElementType
- IfcSpatialZoneType
- IfcStructuralConnectionCondition
- IfcStructuralLoad
- IfcStructuralLoadGroup
- IfcStyledItem
- IfcTable
- IfcTableColumn
- IfcTask
- IfcTaskType
- IfcTelecomAddress
- IfcTextureCoordinateGenerator
- IfcTimeSeries
- IfcTopologyRepresentationTypes
- IfcTypeProcess
- IfcTypeProduct
- IfcTypeResource
- IfcUniquePropertySetNames
- IfcUniquePropertyTemplateNames
- IfcUniqueQuantityNames
- IfcWindow
- IfcWindowType
- IfcWorkControl
- IfcZone