The SelectionListType VariableTypeis used for a Variablewhere the possible values are provided by a set of values.

The Selections Propertycontains an array of values which represent valid values for this VariableType’svalue.

The DataTypeof the Selections Propertyarray shall be of the same DataTypeas this VariableType.

Each array element of the optional SelectionDescriptions Propertycontains a human-readable representation of the corresponding value in the Selections Propertyand shall be of the same array size as the Selections Property.

The value of this VariableTypemay be restricted to only the values defined in the Selections Propertyby setting the optional RestrictToList Propertyto a value of True. If the RestrictToList Propertyis not present or has a value of Falsethen the value is not restricted to the set defined by the Selections Property.

The VariableTypeis formally defined in Table 77.

Table 77– SelectionListType Definition

Attribute		Value
BrowseName		SelectionListType
IsAbstract		False
ValueRank		−2 (−2 = Any)
DataType		BaseDataType
References	NodeClass		Browse Name	DataType TypeDefinition	ModellingRule
Subtype of the BaseDataVariableType defined in 7.4
HasProperty	Variable		Selections	BaseDataType[] PropertyType	Mandatory
HasProperty	Variable		SelectionDescriptions	LocalizedText[] PropertyType	Optional
HasProperty	Variable		RestrictToList	Boolean PropertyType	Optional