5 AAS metamodel representation in the OPC UA information model ToC Previous Next

5.4 Handling of Dictionary Entries ToC Previous Next

The ObjectTypes in this specification define dictionary entries (using the HasDictionaryEntry References) in various places either directly on the ObjectType or the InstanceDeclarations. By the nature of this non-hierarchical Reference this only defines the dictionary entry for the corresponding Node. It does not require, from the OPC UA modelling concepts, that instances of the ObjectType or instances based on InstanceDeclarations have to have the same dictionary entries. However, this is the intention in this specification. Therefore, all Objects that are instance of an ObjectType defined in this specification shall have the same HasDictionaryEntry References to the same dictionary entries as the ObjectType. The same is true for the InstanceDeclarations. Instances based on InstanceDeclarations shall have References to the same dictionary entries as their InstanceDeclarations. In both cases it is allowed, that instances have additional References to other DictionaryEntries.

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