The CDTRate is a generic term for DataTypes that conform to the Rate type. The actual DataTypes are defined separately according to each primitive data type of content component. Table 32 defines the DataTypes.

Table 32 - DataTypes according to CDTRate

Content Component data type	OPC UA CC DataType	OPC UA CDT DataType
Decimal	Decimal	CDTRateDecimal
Double	Double	CDTRateDouble
Float	Float	CDTRateFloat
Integer	Integer	CDTRateInt32

The CDTRate is a quantity, amount, frequency, or dimensionless factor, measured against an independent base unit, expressed as a quotient. In addition CCTS describe it is used to represent the numerical quotient resulting from a comparison of two independent things such as a quantity measured with respect to another measured quantity such as a rate of speed, a measure of a part with respect to a whole - a proportion such as the mortality rate, a tax rate, the cost per unit of a commodity or service or a charge or payment calculated in relation to a particular sum or quantity such as interest rates. The quotient is calculated by taking into account the Rate.Multiplier.Value and Rate.Base.Multiplier. Value supplementary components that affect the unit codes used at the numerator and the denominator.

Table 33 - CDTRate Definition

Attribute	Value
BrowseName	One of the OPC UA CDT DataType values in Table 32)
IsAbstract	False
References	NodeClass	BrowseName	DataType	TypeDefinition	ModellingRule
Subtype of the CC DataType according to the BrowseName
HasCDTSupplemental	Variable	Multiplier	Double	PropertyType	Optional
HasCDTSupplemental	Variable	Unit	EUInformation	PropertyType	Optional
HasCDTSupplemental	Variable	Currency	CurrencyCode	PropertyType	Optional
HasCDTSupplemental	Variable	BaseMultiplier	Double	PropertyType	Optional
HasCDTSupplemental	Variable	BaseUnit	EUInformation	PropertyType	Optional
HasCDTSupplemental	Variable	BaseCurrency	CurrencyCode	PropertyType	Optional

Multiplier defines multiplier of the numerator. The default value is "1" if the element is omitted.

Unit defines the unit of measure of the numerator. The Unit is represented in EUInformation defined in OPC UA Part8.

Currency defines the currency unit of the numerator.

BaseMultiplier defines multiplier of the denominator. The default value is "1" if the element is omitted.

BaseCurrency defines the currency unit of the denominator BaseUnit defines the unit of measure of the denominator. The BaseUnit is represented in EUInformation defined in OPC UA Part8.