Here is a list of all documented variables with links to the class documentation for each member:

- r -

r : API_ArcType, API_PrimArc
radial : API_DimensionPrefs
radialDimension : API_Element
radii : API_RubberArcType
radius : API_AngleDimensionType, API_LghtType
railEndFillet : API_RailingRailConnectionType
railEndOffset : API_RailingRailConnectionType
railing : API_Element, API_ElementQuantity, API_ElementQuantityMask
railing2DDisplayCompBalusters : API_RailingModelViewOptions
railing2DDisplayCompHandrails : API_RailingModelViewOptions
railing2DDisplayCompInnerPosts : API_RailingModelViewOptions
railing2DDisplayCompPanels : API_RailingModelViewOptions
railing2DDisplayCompPosts : API_RailingModelViewOptions
railing2DDisplayCompRails : API_RailingModelViewOptions
railing2DDisplayCompTopRail : API_RailingModelViewOptions
railing3DDetailLevel : API_RailingModelViewOptions
railingBaluster : API_Element, API_ElementQuantity, API_ElementQuantityMask
railingBalusters : API_ElementMemo
railingBalusterSet : API_Element
railingBalusterSets : API_ElementMemo
railingEndFinish : API_Element
railingHandrail : API_Element, API_ElementQuantity, API_ElementQuantityMask
railingHandrailConnection : API_Element, API_ElementQuantity, API_ElementQuantityMask
railingHandrailConnections : API_ElementMemo
railingHandrailEnd : API_Element, API_ElementQuantity, API_ElementQuantityMask
railingHandrailEnds : API_ElementMemo
railingHandrails : API_ElementMemo
railingInnerPost : API_Element, API_ElementQuantity, API_ElementQuantityMask
railingInnerPosts : API_ElementMemo
railingModelViewOptions : API_ModelViewOptions
railingNode : API_Element
railingNodes : API_ElementMemo
railingPanel : API_Element, API_ElementQuantity, API_ElementQuantityMask
railingPanels : API_ElementMemo
railingPattern : API_Element
railingPatterns : API_ElementMemo
railingPost : API_Element, API_ElementQuantity, API_ElementQuantityMask
railingPosts : API_ElementMemo
railingRail : API_Element, API_ElementQuantity, API_ElementQuantityMask
railingRailConnection : API_Element, API_ElementQuantity, API_ElementQuantityMask
railingRailConnections : API_ElementMemo
railingRailEnd : API_Element, API_ElementQuantity, API_ElementQuantityMask
railingRailEnds : API_ElementMemo
railingRails : API_ElementMemo
railingSchemeCutLineIndex : API_RailingModelViewOptions
railingSchemeCutLinePenIndex : API_RailingModelViewOptions
railingSchemeSurfaceIndex : API_RailingModelViewOptions
railingSchemeUncutLineIndex : API_RailingModelViewOptions
railingSchemeUncutLinePenIndex : API_RailingModelViewOptions
railingSegment : API_Element, API_ElementQuantity, API_ElementQuantityMask
railingSegments : API_ElementMemo
railingToprail : API_Element, API_ElementQuantity, API_ElementQuantityMask
railingToprailConnection : API_Element, API_ElementQuantity, API_ElementQuantityMask
railingToprailConnections : API_ElementMemo
railingToprailEnd : API_Element, API_ElementQuantity, API_ElementQuantityMask
railingToprailEnds : API_ElementMemo
railingToprails : API_ElementMemo
range : API_ContentPars, API_ParagraphType, API_RunType
rasterizeDPI : API_DrawingType
ratio : API_ArcType, API_DrawingType, API_PrimArc
ratioEdgeData : API_AnalyticalMemberPartRef
ratioEnd : API_AMPartRefRatioEdgeData
ratioStart : API_AMPartRefRatioEdgeData
rcpdLayout : API_StairType
readOnly : API_IFCAttribute, API_IFCClassificationReference, API_IFCPropertyHead, API_LibraryInfo
realValue : API_ChangeParamType
realValues : API_GetParamValuesType
receiveShadow : API_MorphType
recurrence : API_DailyProfileUsage
reducedExtrArea : API_ZoneAllQuantity
reducementArea : API_ZoneAllQuantity
reducePercent : API_ZoneType
ref : API_WindowInfo
refC : API_DimensionType
refC3D : API_DimensionType
refCon : API_IOParams
refEndInd : API_WallType
referenceAxisLineTypeIndex : API_OpeningReferenceAxisParameters
referenceAxisOverhang : API_OpeningReferenceAxisParameters
referenceAxisParameters : API_OpeningFloorPlanParameters
referenceAxisPenIndex : API_OpeningReferenceAxisParameters
referencedSource : API_IFCClassificationReference
referenceId : ACAPI::MEP::RoutingSegmentCircularCrossSectionData
referenceLineLocation : API_WallType
referenceLinePen : API_RailingType
referenceName : API_IFCClassificationReference
referencePlaneLocation : API_SlabType
referenceRay : API_AnalyticalCylinderSurface
referenceSurface : API_ShellQuantity
referenceSurface_cond : API_ShellQuantity
referredDrawing : API_MarkerLinkDataType
referredPMViewPoint : API_MarkerLinkDataType
referredView : API_MarkerLinkDataType
referringLevel : API_MarkerLinkDataType
referToDrawing : API_MarkerLinkDataType
refFloorInd : API_HotlinkNode
refFloorName : API_HotlinkNode
refFrame : API_CWAccessoryType
refId : API_DocumentFrom3DDefaults
refInd : API_WallType
reflected : API_ArcType, API_ObjectType, API_OpeningBaseType, API_PrimArc
refLineFlag : API_ZoneType
refLineLength : API_WallQuantity
refLineLocation : API_RailingSegmentType
refLineOnCursor : API_CursorSet
refLtype : API_BeamType
refMat : API_WallType
refPen : API_BeamType
refPointOnCursor : API_CursorSet
refPoly : API_ZoneType
refPos : API_ZoneType
refSide : API_OpeningBaseType
relation : API_AnalyticalLoadGroup
relative : API_RailingRailType
relativeHomeStoryLevel : API_AssemblySegmentData
relativeSkewingAngle : API_RailingSegmentType
relativeTopStory : API_ColumnType, API_StairType, API_WallType, API_ZoneType
relativeToStory : API_SectionSegment
releaseDescriptions : API_AnalyticalReleaseType
releaseVersion : API_ServerApplicationInfo
relFillsTable : API_IFCRelationshipData
relinkWallOpenings : API_HotlinkType
relVoidsTable : API_IFCRelationshipData
removeLine : API_SavePars_Object
rendererID : API_RendEffects
renderingSceneName : API_NavigatorView
renovationFilterGuid : API_Elem_Head, API_NavigatorView
renovationStatus : API_Elem_Head, API_Prim_Head
reportLevel : API_ImagingAndCalcPrefs
requiredSSALevel : API_AddOnInfo
resistanceFx : API_AnalyticalLink_Translation
resistanceFy : API_AnalyticalLink_Translation
resistanceFz : API_AnalyticalLink_Translation
resistanceMx : API_AnalyticalLink_Rotation
resistanceMy : API_AnalyticalLink_Rotation
resistanceMz : API_AnalyticalLink_Rotation
reveal : API_WindowType
revealDepthFromSide : API_WindowType
revealDepthLocation : API_WindowType
revealDepthOffset : API_WindowType
revolutionAngle : API_RevolvedShellData
revolvedEdgeDatas : API_RevolvedShellData
rgb : API_Pen, API_ZoneCatType
rgbColor : API_PrimPoly
rgr_layer : API_Elem_Head
ridgesLength : API_RoofQuantity, API_ShellQuantity
righFram : API_LibPartDoorWindowDetails
righFramExpr : API_LibPartDoorWindowDetails
right : API_PrintPars, API_Rect
rightIndent : API_ParagraphType
rightLength : API_BeamQuantity, API_BeamSegmentQuantity
rightMargin : API_LayoutInfo, API_SavePars_Pdf
rightMaterial : API_BeamSegmentType, API_MonolithStairStructData
rightPanelID : API_CWSegmentPatternCellData
rightSurface : API_BeamSegmentQuantity
rigidSettings : API_AnalyticalLink_Settings
riser : API_StairType
riserGoingRatioMaxApplied : API_StairRulesData
riserGoingRatioMaxValue : API_StairRulesData
riserGoingRatioMinApplied : API_StairRulesData
riserGoingRatioMinValue : API_StairRulesData
riserHeight : API_StairType
riserHeightMaxApplied : API_StairRulesData
riserHeightMaxValue : API_StairRulesData
riserHeightMinApplied : API_StairRulesData
riserHeightMinValue : API_StairRulesData
riserPlusGoingMaxApplied : API_StairRulesData
riserPlusGoingMaxValue : API_StairRulesData
riserPlusGoingMinApplied : API_StairRulesData
riserPlusGoingMinValue : API_StairRulesData
riserPosition : API_StairRiserType
rLinEndInd : API_WallType
rLinInd : API_WallType
role : API_StairRiserType, API_StairStructureType, API_StairTreadType
rollAngle : API_PerspPars
roof : API_Element, API_ElementQuantity, API_ElementQuantityMask
roofClass : API_RoofType
roofContourDisplay : API_LegacyPrefs
roofEdgeTypes : API_ElementMemo
roofInsulationFills : API_CalcRulesPrefs
roofShellMode : API_ModelViewOptions
roomBaseLev : API_ZoneType
roomEdge : API_WallPart
roomFlThick : API_ZoneType
roomGuid : API_RoomImage
roomHeight : API_ZoneType
roomHeightLimits : API_ZonePrefs
roomLSize : API_ZoneType
roomName : API_ZoneType
roomNoStr : API_ZoneType
roomRedPercents : API_ZonePrefs
rooms : API_RoofRelation
roomSeparator : API_ArcType, API_LineType, API_PolyLineType, API_SplineType
roomSpecial : API_HatchType
roomTopOffset : API_ZoneType
rootGuid : API_NavigatorSet
rotAng : API_Texture
rotAngle : API_PictureType, API_PrimPict
rotation : ACAPI::MEP::Orientation, API_AnalyticalLink_SpringSettings, API_GhostRecord
rotationAngle : API_AnalyticalCurveMember
rotationStiffnessVector : API_AnalyticalLinkGeometry, API_AnalyticalSupportGeometry
roundInch : API_CalcLengthFormat, API_LengthDimFormat, API_WorkingUnitPrefs
rowAnchor : API_NoteType
rubberLineInfoProc : API_RubberPolyCallbacks
ruledEdgeDatas : API_RuledShellData
ruleMaxApplied : API_StairRulesData
ruleMaxValue : API_StairRulesData
ruleMinApplied : API_StairRulesData
ruleMinValue : API_StairRulesData
rules : API_StairType
run : API_ParagraphType
runningInBackground : API_ServerApplicationInfo
runVLScriptOnlyOnce : API_LibPartDoorWindowDetails, API_LibPartObjectDetails
rxType : API_AnalyticalSupport_SupportValues
rxValue : API_AnalyticalSupport_SupportValues
ryType : API_AnalyticalSupport_SupportValues
ryValue : API_AnalyticalSupport_SupportValues
rzType : API_AnalyticalSupport_SupportValues
rzValue : API_AnalyticalSupport_SupportValues