Gets a key that uniquely identifies this element.
In many cases this will be the same as DataViewCategoricalValuePathElement.formattedValue and DataViewCategoricalValuePathElement.value. However there are cases when those values can contain duplicates. For instance when working with cube data, or when using formatters and display values.
They key is suitable to be used for identifying objects when implementing rendering transitions.
The key can be null when the corresponding DataViewCategoricalValuePathElement.value is null.
Gets the value of this element, or null if this element represents a missing or invalid data point.
The type of the returned value can be determined from the DataViewHierarchy.levels in the DataViewHierarchy of the associated DataViewCategoricalAxis.
Represents an element in the
path
of a DataViewCategoricalValue.