FilterElement QML Type

A content filter element contains an operator and operands. There are four different operator types which contain literal values, references to attributes of nodes or to other content filter elements.

A combination of one or more content filter elements makes a content filter which is used by the server to filter data for the criteria defined by the content filter elements. For example, the where clause of an event filter is a content filter which is used to decide if a notification is generated for an event.

QtOpcUa.FilterElement {
    operator: QtOpcUa.FilterElement.GreaterThanOrEqual
    firstOperand: QtOpcUa.SimpleAttributeOperand { ... }
    secondOperand: QtOpcUa.LiteralOperand { ... }
}

See Also▲

firstOperand : variant▲

operatorType : enumeration▲

secondOperand : variant▲