Datum Plane Class

System Object
Autodesk.Revit.DB Element
Autodesk.Revit.DB DatumPlane
Autodesk.Revit.DB Grid
Autodesk.Revit.DB Level
Autodesk.Revit.DB ReferencePlane

	Name	Description
	AssemblyInstanceId	The id of the assembly instance to which the element belongs. (Inherited from Element )
	BoundingBox	Retrieves a box that circumscribes all geometry of the element. (Inherited from Element )
	Category	Retrieves a Category object that represents the category or sub category in which the element resides. (Inherited from Element )
	CreatedPhaseId	Id of a Phase at which the Element was created. (Inherited from Element )
	DemolishedPhaseId	Id of a Phase at which the Element was demolished. (Inherited from Element )
	DesignOption	Returns the design option to which the element belongs. (Inherited from Element )
	Document	Returns the Document in which the Element resides. (Inherited from Element )
	Geometry	Retrieves the geometric representation of the element. (Inherited from Element )
	GroupId	The id of the group to which an element belongs. (Inherited from Element )
	Id	A unique identifier for an Element in an Autodesk Revit project. (Inherited from Element )
	IsModifiable	Identifies if the element is modifiable. (Inherited from Element )
	IsTransient	Indicates whether an element is transient or permanent. (Inherited from Element )
	IsValidObject	Specifies whether the .NET object represents a valid Revit entity. (Inherited from Element )
	LevelId	The id of the level associated with the element. (Inherited from Element )
	Location	This property is used to find the physical location of an element within a project. (Inherited from Element )
	Name	A human readable name for the Element. (Inherited from Element )
	OwnerViewId	The id of the view that owns the element. (Inherited from Element )
	Parameter BuiltInParameter	Retrieves a parameter from the element given a parameter id. (Inherited from Element )
	Parameter Definition	Retrieves a parameter from the element based on its definition. (Inherited from Element )
	Parameter Guid	Retrieves a parameter from the element given a GUID for a shared parameter. (Inherited from Element )
	Parameters	Retrieves a set containing all of the parameters that are contained within the element. (Inherited from Element )
	ParametersMap	Retrieves a map containing all of the parameters that are contained within the element. (Inherited from Element )
	Pinned	Identifies if the element has been pinned to prevent changes. (Inherited from Element )
	UniqueId	A stable unique identifier for an element within the document. (Inherited from Element )
	VersionGuid	Get the element version Guid. (Inherited from Element )
	ViewSpecific	Identifies if the element is owned by a view. (Inherited from Element )
	WorksetId	Get Id of the Workset which owns the element. (Inherited from Element )

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	Name	Description
	AddLeader	Adds a default Leader for the indicated end of the datum plane. This method does not apply to Reference planes (which do not support leaders).
	ArePhasesModifiable	Returns true if the properties CreatedPhaseId and DemolishedPhaseId can be modified for this Element. (Inherited from Element )
	CanBeHidden	Indicates if the element can be hidden in the view. (Inherited from Element )
	CanBeLocked	Identifies if the element can be locked. (Inherited from Element )
	CanBeVisibleInView	Checks if the datum plane can be visible in the view.
	CanDeleteSubelement	Checks if given subelement can be removed from the element. (Inherited from Element )
	CanHaveTypeAssigned	Identifies if the element can have a type assigned. (Inherited from Element )
	ChangeTypeId(ElementId)	Changes the type of the element. (Inherited from Element )
	DeleteEntity	Deletes the existing entity created by %schema% in the element (Inherited from Element )
	DeleteSubelement	Removes a subelement from the element. (Inherited from Element )
	DeleteSubelements	(Inherited from Element )
	Dispose	(Inherited from Element )
	Equals	Determines whether the specified object is equal to the current object. (Inherited from Object )
	EvaluateAllParameterValues	Evaluates all the parameters' values of the element. (Inherited from Element )
	EvaluateParameterValues	(Inherited from Element )
	GetCurvesInView	Gets a collection of curves representing the DatumPlane element in the given view.
	GetDatumExtentTypeInView	Identifies whether the curve representing the datum plane is displayed according to its actual 3d extents, or else according to a view specific setting.
	GetDependentElements	Get all elements that, from a logical point of view, are the children of this Element. (Inherited from Element )
	GetEntity	Returns the existing entity corresponding to the Schema if it has been saved in the Element, or an invalid entity otherwise. (Inherited from Element )
	GetEntitySchemaGuids	Returns the Schema guids of any Entities stored in this element. (Inherited from Element )
	GetExternalFileReference	Gets information pertaining to the external file referenced by the element. (Inherited from Element )
	GetExternalResourceReference	Gets the ExternalResourceReference associated with a specified external resource type. (Inherited from Element )
	GetExternalResourceReferenceExpanded	Gets the collection of ExternalResourceReference associated with a specified external resource type. (Inherited from Element )
	GetExternalResourceReferences	Gets the map of the external resource references referenced by the element. (Inherited from Element )
	GetExternalResourceReferencesExpanded	Gets the expanded map of the external resource references referenced by the element. (Inherited from Element )
	GetGeneratingElementIds	Returns the ids of the element(s) that generated the input geometry object. (Inherited from Element )
	GetGeometryObjectFromReference	Retrieve one geometric primitive contained in the element given a reference. (Inherited from Element )
	GetHashCode	Serves as the default hash function. (Inherited from Object )
	GetLeader	Gets a copy of the leader applied to the indicated end of the datum plane. This method does not apply to Reference planes (which do not support leaders).
	GetMaterialArea	Gets the area of the material with the given id. (Inherited from Element )
	GetMaterialIds	Gets the element ids of all materials present in the element. (Inherited from Element )
	GetMaterialVolume	Gets the volume of the material with the given id. (Inherited from Element )
	GetMonitoredLinkElementIds	Provides the link instance IDs when the element is monitoring. (Inherited from Element )
	GetMonitoredLocalElementIds	Provides the local element IDs when the element is monitoring. (Inherited from Element )
	GetOrderedParameters	Gets the parameters associated to the element in order. (Inherited from Element )
	GetParameter	Retrieves a parameter from the element given identifier. (Inherited from Element )
	GetParameterFormatOptions	Returns a FormatOptions override for the element Parameter, or a default FormatOptions if no override exists. (Inherited from Element )
	GetParameters	Retrieves the parameters from the element via the given name. (Inherited from Element )
	GetPhaseStatus	Gets the status of a given element in the input phase (Inherited from Element )
	GetPropagationViews	Gets a list of candidate views which are parallel to the current view and to which the extents of the datum may be propagated.
	GetSubelements	Returns the collection of element subelements. (Inherited from Element )
	GetType	Gets the Type of the current instance. (Inherited from Object )
	GetTypeId	Returns the identifier of this element's type. (Inherited from Element )
	GetValidTypes	Obtains a set of types that are valid for this element. (Inherited from Element )
	HasBubbleInView	Identifies if the DatumPlane has bubble or not.
	HasPhases	Returns true if this Element has the properties CreatedPhaseId and DemolishedPhaseId. (Inherited from Element )
	HideBubbleInView	Hides the bubble in a view. This method does not apply to Reference planes.
	IsBubbleVisibleInView	Identifies if the bubble is visible or not in a view.
	IsCreatedPhaseOrderValid	Returns true if createdPhaseId and demolishedPhaseId are in order. (Inherited from Element )
	IsCurveValidInView	Checks if the curve is valid to be as the extents for the datum plane in a view. The curve must be bound and coincident with the original one of the datum plane.
	IsDemolishedPhaseOrderValid	Returns true if createdPhaseId and demolishedPhaseId are in order. (Inherited from Element )
	IsExternalFileReference	Determines whether this Element represents an external file. (Inherited from Element )
	IsHidden	Identifies if the element has been permanently hidden in the view. (Inherited from Element )
	IsLeaderValid	Identifies if the leader valid or not for this DatumPlane. This method does not apply to Reference planes (which do not support leaders).
	IsMonitoringLinkElement	Indicate whether an element is monitoring any elements in any linked models. (Inherited from Element )
	IsMonitoringLocalElement	Indicate whether an element is monitoring other local elements. (Inherited from Element )
	IsPhaseCreatedValid	Returns true if createdPhaseId is an allowed value for the property CreatedPhaseId in this Element. (Inherited from Element )
	IsPhaseDemolishedValid	Returns true if demolishedPhaseId is an allowed value for the property DemolishedPhaseId in this Element. (Inherited from Element )
	IsValidType(ElementId)	Checks if given type is valid for this element. (Inherited from Element )
	LookupParameter	Attempts to find a parameter on the element which has the given name. (Inherited from Element )
	Maximize3DExtents	Computes the 3d extents of all model geometry and levels, and extends the 3d extents of this datum surface to include the model extents.
	PropagateToViews
	RefersToExternalResourceReference	Determines whether this Element uses external resources associated with a specified external resource type. (Inherited from Element )
	RefersToExternalResourceReferences	Determines whether this Element uses external resources. (Inherited from Element )
	SetCurveInView	Sets the extents to match the curve.
	SetDatumExtentType	Sets whether the curve representing the datum plane is displayed according to its 3d extents, or else according to a view specific setting.
	SetEntity	Stores the entity in the element. If an Entity described by the same Schema already exists, it is overwritten. (Inherited from Element )
	SetLeader	Sets the leader to the indicated end of the datum plane. This method does not apply to Reference planes (which do not support leaders).
	ShowBubbleInView	Shows the bubble in a view. This method does not apply to Reference planes.
	ToString	Returns a string that represents the current object. (Inherited from Object )

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A DatumPlane represents a 3d surface with finite extents. It can be either a rectangle with arbitrary orientation, or a cylinder whose axis is parallel to the project z-axis. If a datum is visible in a plan or section view, it will be displayed as one or more curves. These curves are determined by the intersection of the datum surface with the cut plane of the view. By default, the extents of these curves reflect the 3d extents of the datum surface. If the surface is a plane, then the extents represent the projection of the surface onto the cut plane. This matters, for example, when viewing a datum plane, really a 3d rectangle, along one of its diagonals. The extents of the curve do not vary with the location of the view, because we use the projection of the rectangle and not the actual intersection. If the surface is a cylinder, then the extents reflect the actual intersection of the surface with the cut plane. In addition, the curves that represent a DatumPlane can be modified on a view specific basis. In this case, the ends of the curve no longer reflect the 3d extents of the datum.

Reference