Logical Operators

The logical operators are NOT, AND, and OR, in order of precedence. These operators have the usual Boolean logic semantics.

/FIXML/Order/Instrmt/@Sym = 'IBM' OR /FIXML/Order/Instrmt/@Sym = 'MSFT'

As with other operators, you can use parentheses to group operators and affect the order of evaluation.

(/orderType = 'rush' AND /customerType IN ('silver', 'gold') )
OR  /customerType = 'platinum'

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