XQuery Logical Expressions

Expression:

Example(s):

Logical Expressions

1. <logical>

   {

     IF (3 > 2) AND (2 != 4)

     THEN <yes/>

     ELSE <no/>

   }

   </logical>

The output produced by this xquery is:

<?xml version="1.0"?>

<logical>

  <yes/>

</logical>

2. <strcomp>

   {

     IF ("yes" = "no") OR ("007" = "7")

     THEN <yes/>

     ELSE <no/>

   }

   </strcomp>

The output produced by this xquery is:

<?xml version="1.0"?>

<strcomp>

  <no/>

</strcomp>

Of course, you could make the expression that evaluates as complex as you want – just remember that the output must always be false or true.