Description
The fn:max function finds the maximum of a sequence of values. The $arg sequence can only contain values of one type, or a type derived from it. The one exception is that they can be all numeric (of different numeric types), in which case numeric promotion rules apply. That type must be ordered; it must be possible to compare the values using the < and > operators.
The fn:max function assumes untyped values are numeric unless they are explicitly cast to xs:string. To treat untyped data as strings, use the fn:string function as shown in the last example below.
This description is © Copyright 2007, O'Reilly Media. It is excerpted from the book XQuery by Priscilla Walmsley, O'Reilly, 2007. For a complete explanation of this function, please refer to Appendix A of the book. Arguments and Return Type| Name | Type | Description |
|---|
$arg |
xs:anyAtomicType* |
the sequence of values |
$collation |
xs:string |
the collation to use for comparing strings |
| return value |
xs:anyAtomicType? |
Examples<xsl:variable name="ordDoc" select="doc('http://www.functx.com/input/order.xml')"/>
|
| XSLT Example | Results |
|---|
max( (2, 1, 5, 4, 3) )
|
5
|
max( ('a', 'b', 'c') )
|
c
|
max(
(xs:date('1999-04-15'), current-date()) )
|
The current date |
max( ('a', 'b', 1) )
|
Error FORG0006 |
max( 2 )
|
2
|
max($ordDoc//item/@dept)
|
Error, if dept is untyped |
max($ordDoc//item/string(@dept))
|
WMN
|
See AlsoHistory |
|
