The encoding of the ActionMetaData message structure is specified in Table 176.
The Responder shall send this message without a corresponding discovery probe if the configuration of the Action changed.
Table 176 – ActionMetaData announcement message structure
|
Name |
Type |
Description |
|
DataSetWriterId |
UInt16 |
DataSetWriterId of the Actions described with the MetaData. |
|
ActionTargets |
ActionTargetDataType[] |
The set of Action targets that may be executed. If an Action target is mapped to a Method of an Object in an OPC UA Server, then the related Object and Method are defined by the corresponding entry in the ActionMethods array. The ActionTargetId in the ActionTargetDataType is used to address the Method referenced by the ActionMethodDataType. |
|
Request |
DataSetMetaDataType |
The structure and content of the ActionRequest message. The name of the Action is defined by the Name field in the DataSetMetaDataType. |
|
Response |
DataSetMetaDataType |
The structure and content of the ActionResponse message. The fields Name and ConfigurationVersion of the Request and the Response DataSetMetaDataType shall have equal values. |
|
ActionMethods |
ActionMethodDataType[] |
The optional array of Action sources. If the source information is provided, the array shall match the size and order of the ActionTargets. The namespace URIs for the NamespaceIdex in the NodeIds shall be contained in the Request DataSetMetaData. |