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• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  B.2.3 QueryFirst
  Specifies a View and temporal context to a Server (see 7.44 for ViewDescription definition). nodeTypes [] NodeTypeDescription This is the Node type description. This structure is defined in-line with ... array of QueryDataSets . This array is empty if no Nodes or References met the nodeTypes criteria. In this case the continuationPoint parameter should be empty. The QueryDataSet type is defined