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• OPC-10000-8 – OPC Unified Architecture - Part 8: Data Access
  6.3.2 Using Dictionary References
  HasDictionaryEntry is used to define the relationship to a Syntax Reference by referencing from quantity or unit Nodes to an instance of a SyntaxReferenceEntryType . Each quantity or unit instance ... Syntax Reference identifier ( SyntaxReferenceId ), see 6.3.3 When calling the Browse Service for a Quantity or Unit Node , the response includes the HasDictionaryEntry Reference together with the well-defined NodeId