Problem analyzing OPCUA Server root types. Unexpected DataTypeDefinition attribute found

[emiliodiritaRA]

I have an OPCUA client which import OPCUA server nodes.
Of course I need to import all types before import instances.
I notice something strange exploring your python OPCUA server example (./examples/server-example.py) with UA Expert
All root types, BaseEventType, BaseInterfaceType, BaseObjectType, References and BaseVariableType have DataType icon, while they should have Type icon.
I immediately check the NodeClass attributes of those items, and they are correct.
So I do not understand why they are recognised as DataTypes.
What I found strange is that they have "DataTypeDefinition" attribute specified (the new opcua specification attribute for Structures and Enums).
This attribute is specified only for them, not for subTypes.
I think this can create problems navigating with references and check type consistency.
The attribute on root types is something that you put intentionally?
If yes, why?

To Reproduce

Start the example server (./examples/server-example.py) and connect with UAExpert

Expected behavior

DataTypeDefinition attribute not present on root types (BaseEventType, BaseInterfaceType, BaseObjectType, References and BaseVariableType)

Screenshots

Version

Python-Version: 3.10.2

opcua-asyncio Version (e.g. master branch, 0.9): master (f2ff44b)

[schroeder-]

This this patch help #937 with the problem?

[emiliodiritaRA]

Unfortunately not.
I write a comment in the referenced issue