This VariableType is an abstract type. That is, no instances of this type can exist. However, it might be used in a filter when browsing or querying. The DiscreteItemTypederives from the DataItemTypeand therefore shares all of its characteristics. It is formally defined in Table 3.
Table 3– DiscreteItemType definition
|
Attribute |
Value |
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|
BrowseName |
DiscreteItemType |
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|
IsAbstract |
True |
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|
ValueRank |
−2 (−2 = ‘Any’) |
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|
DataType |
BaseDataType |
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|
References |
NodeClass |
BrowseName |
DataType |
TypeDefinition |
ModellingRule |
|
Subtype of the DataItemTypedefined in 5.2; i.e the Propertiesof that type are inherited. |
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|
HasSubtype |
VariableType |
TwoStateDiscreteType |
Defined in 5.3.3.2 |
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|
HasSubtype |
VariableType |
MultiStateDiscreteType |
Defined in 5.3.3.3 |
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|
HasSubtype |
VariableType |
MultiStateValueDiscreteType |
Defined in 5.3.3.4 |
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