The SelectionListType VariableType is used for a Variable where the possible values are provided by a set of values.

The Selections Property contains an array of values which represent valid values for this VariableType’s value.

The DataType of the Selections Property array shall be of the same DataType as this VariableType. When the SelectionListType is subtyped, the DataType of the Selections Property array of the subtype shall be the same DataType as the subtype.When the SelectionListType is instantiated, the DataType of the Selections Property array of the instance shall be the same as the DataType of the instance.

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

The value of this VariableType may be restricted to only the values defined in the Selections Property by setting the optional RestrictToList Property to a value of True. If the RestrictToList Property is not present or has a value of False then the value is not restricted to the set defined by the Selections Property.

The VariableType is formally defined in Table 83.

Table 83 – SelectionListType definition

Attribute		Value
BrowseName		SelectionListType
IsAbstract		False
ValueRank		-1 (-1 – Scalar)
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
Conformance Units
Base Info Selection List