Use Case

The current configuration of inputs.opcua_listener is not following the real naming structure of OPC UA and the current configuration, based on NamespaceIndex is a risk because the index can change on server side after a restart as you can see in the link provided.

Current conguration of a node:
nodes = [ {name="namespaces", namespace="0", identifier_type="i", identifier="2255"}, ]

Expected behavior

I would propose a configuration string like the following when accessing by NamespaceIndex (for the ones who still want to use the legacy method).
nodes = [ {name="namespaces", NamespaceIndex="0", IdentifierType="i", Identifier="2255"}, ]

I would propose a configuration string like the following when accessing by Namespace (for the ones who want to use the new and secure method).
nodes = [ {name="namespaces", Namespace="http://opcfoundation.org/UA/", IdentifierType="i", Identifier="2255"}, ]

Actual behavior

The behavior in the end will be the same with the only benefit of having the namespace change under control.

Additional info

Clear explanation of the behavior.
https://documentation.unified-automation.com/uasdkhp/1.4.1/html/_l2_ua_node_ids.html