2.5.40 ChartNumNillable


ChartNumNillable is an 8-byte union that specifies a floating-point value, or a non-numeric value defined by the containing record. The type and meaning of the union contents are determined by the most significant 2 bytes, and is defined in the following table:

Value of most significant 2 bytes

Type and meaning of union contents


A NilChartNum that specifies a non-numeric value, as defined by the containing record.

Any other value.

An Xnum (section 2.5.342) that specifies a floating-point value.