Can any DataType have a DataTypeDefinition attribute?|OPC UA Standard|Forum|OPC Foundation

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Can any DataType have a DataTypeDefinition attribute?
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João Barbosa-Neto
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01/29/2020 - 14:54
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Greetings,

The DataType NodeClass table that is in part 3 of the UA spec states that the DataTypeDefinition attribute is mandatory for DataTypes derived from Structure, Union, Enumeration, OptionSet, and subtypes of UInteger representing an OptionSet. Seeing as how the DataTypeDefinition is optional for any nodes that have a NodeClass of DataType, could a DataTypeDefinition also be included with other DataTypes that are not listed above?

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Randy Armstrong
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01/29/2020 - 22:06
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The DataTypeDefinition attribute has no meaning for DataTypes other than the ones listed so it should not be present.

That said, we need to deal with the case where the DataType is BaseDataType and the value may or may not be present depending on the current Value. I created a Mantis issue:

https://apps.opcfoundation.org…..hp?id=5414

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