Can a Variable DataType be NullID?|OPC UA Standard|Forum|OPC Foundation

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Can a Variable DataType be NullID?
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Andrew Thomas
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01/12/2023 - 13:15
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My server contains nodes whose values could have any type, so the node’s DataType cannot be a concrete type.  Is it legal for the server to return NullId for the node’s DataType, or must it return BaseDataType?

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Randy Armstrong
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01/14/2023 - 17:11
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It must be BaseDataType. Null is always invalid.

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Andrew Thomas
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01/16/2023 - 09:16
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Got it.  Thank you, Randy.

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