ColumnSchema<C>.CategoryIndex Property

public IIndex? CategoryIndex { get; }

Public ReadOnly Property CategoryIndex As IIndex
	Get

public:
virtual property IIndex^ CategoryIndex {
	IIndex^ get () sealed;
}

abstract CategoryIndex : IIndex with get
override CategoryIndex : IIndex with get

Property Value

Implements

A null value means the column is not currently represented categorically. A non-null value contains the category values in their categorical representation order.

The category order is always preserved as part of the categorical representation. It is semantically meaningful when Semantics has Ordinal. For nominal, interval, or ratio values represented categorically, the order remains operational metadata for representation, reproducibility, display, and round-tripping. It matters to encodings only when an operation explicitly uses categorical structure.

Reference