Check if either of its Boolean conditions is true.
The operands are tested if either one of them evaluates to the Boolean value "true".
The operator name can only be specified using lower case.
It corresponds to the expression OrExpr defined in XPath,
Section 3.4, Rule
21. Because of the X-Query definition of AndExpr you
can also use SequenceExpr, BetweenExpr, and
ProximityExpr as operands.
Select all patients born in 1950 or 1960 (all patient nodes
that satisfy the following predicate expression: there is an immediate child
node born whose numeric value equals 1950 or there is an immediate
child node born whose numeric value equals 1960):
/patient[born = 1950 or born = 1960]
AndExpr |
EqualityExpr |