namespace 0 mandatory nodes|OPC UA Companion Standards|Forum|OPC Foundation

Part 5 defines the base information model.

The standard folders and Server object are mandatory.

When a component is optional it has the 'Optional' modelling rule.

The built in types can be omitted unless the server has a non-UA sub-type. Then the entire inheritance hierarchy above the type needs to be present.

I need to qualify the statement I made above:

1) All types defined in Part 3 and Part 5 are MANDATORY.

2) NS=0 types defined in other parts (e.g. Part 8) are optional.

There is an exception for 1) for servers running on embedded h/w with limited resources (the micro-profile).

Any server running on PC class systems may not use this profile.