Annex B (informative) ContentFilter and Query examples ToC Previous

B.1 Simple ContentFilter examples ToC Previous Next

B.1.3 Example 2 ToC Previous Next

As another example a filter to select all SystemEvents (including derived types) that are contained in the Area1 View or the Area2 View would result in a logic tree as shown in Figure B.2 and a ContentFilter as shown in Table B.2.

readme_files/image044.png Figure B.2 – Filter logic tree example

Table B.2 describes the elements, operators and operands used in the example.

Table B.2 – ContentFilter example

Element[] Operator Operand[0] Operand[1]
0 And ElementOperand = 1 ElementOperand = 4
1 Or ElementOperand = 2 ElementOperand = 3
2 InView AttributeOperand = NodeId: Area1, BrowsePath: “.”, Attribute: NodeId  
3 InView AttributeOperand = NodeId: Area2, BrowsePath: “.”, Attribute: NodeId  
4 OfType AttributeOperand = NodeId: SystemEventType, BrowsePath: “.”, Attribute: NodeId”  

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