Annex B (informative) Content Filter and Query Examples ToC Previous

B.2 Complex Examples of Query Filters ToC Previous

B.2.1 Overview ToC Previous Next

These query examples illustrate complex filters. The following conventions apply to these examples with regard to Attribute operands (for a definition of these operands, see 7.4.4).

  • AttributeOperand: Refers to a Node, an Attribute of a Node or the Value Attribute of a Property associated with a Node. In the examples character names of ExpandedNodeId are used instead of an actual ExpandedNodeId, this also applies to Attribute Ids.
  • The string representation of relative paths is used instead of the actual structure.
  • The NamespaceIndex used in all examples is 12 (it could just as easily have been 4 or 23 or any value). For more information about NamespaceIndex, see OPC 10000-3. The use of the NamespaceIndex illustrates that the information model being used in the examples is not a model defined by this standard, but one created for the examples.

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