op:date-less-than - XPath XQuery Reference

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XPath/XQuery date-less-than function

Returns true if and only if the starting instant of $arg1 is less than the starting instant of $arg2. Returns false otherwise.

Defines the semantics of the "lt" operator when applied to two xs:date values. Also used in the definition of the "ge" operator.

op:date-less-than(

$arg1 as xs:date,
$arg2 as xs:date

) as xs:boolean

The starting instant of an xs:date is the xs:dateTime at time 00:00:00 on that date.

The function returns the result of the expression:

op:dateTime-less-than(xs:dateTime($arg1), xs:dateTime($arg2))

The expression op:date-less-than(xs:date("2004-12-25Z"), xs:date("2004-12-25-05:00")) returns true().

The expression op:date-less-than(xs:date("2004-12-25-12:00"), xs:date("2004-12-26+12:00")) returns false().

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