Check if one or both of two expression are logically true.

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Syntax

OrExpr

Description

An OrExpr is a logical expression that is evaluated by determining the effective boolean value (ebv) of each of its operands. The value of the OrExpr is then determined as follows:

or expression	ebv(op2) = true	ebv(op2) = false	error in ebv(op2)
ebv(op1) = true	true	true	true or error
ebv(op1) = false	true	false	error
error in ebv(op1)	true or error	error	error

Example

• Select all patients born in 1950 or 1960:

  for $a in input()/patient
  where $a/born = 1950 or $a/born = 1960
  return $a

Related Syntax Construct

The following construct(s) refer to this construct:

• Expr

This construct is also related to the following construct(s):

AndExpr