EXSLT - math:max - Implementer Page

Version: 1
Status: stable
User Page: index.html
XML Definition: math.max.xml
Function Package: math.max.zip

Function Syntax

number math:max(node-set)

Template Syntax

<xsl:call-template name="math:max">
   <xsl:with-param name="nodes" select="node-set" />
</xsl:call-template>

The math:max function returns the maximum value of the nodes passed as the argument. The maximum value is defined as follows. The node set passed as an argument is sorted in descending order as it would be by xsl:sort with a data type of number. The maximum is the result of converting the string value of the first node in this sorted list to a number using the number function.

If the node set is empty, or if the result of converting the string values of any of the nodes to a number is NaN, then NaN is returned.

The math:max template returns a result tree fragment whose string value is the result of turning the number returned by the function into a string.

An implementation of this extension function in the EXSLT math namespace must conform to the behaviour described in this document.

Implementations

Built-in support for math:max is available in the following XSLT processors:

Processor	Processor Version	Implemented Version
4XSLT, from 4Suite.	0.12.0a3	1
SAXON from Michael Kay	6.3	1
jd.xslt from Johannes Döbler	1.0.9	1
libxslt from Daniel Veillard; implementation by Thomas Broyer	1.0.19	1
Xalan-J from Apache	2.4.D1	1

The following implementations of math:max are available:

Language	Implemented Version	Creator	Date	Download
EXSLT Function	1	Jeni Tennison	2001-03-28	math.max.function.xsl
XSLT Template	1	Jeni Tennison	2001-03-28	math.max.template.xsl

Use Cases

Use Case Package: math.max.use-cases.zip

The following use cases illustrate the functionality of math:max.

Details	Calling Stylesheet	XML Data	Expected Result	Category	Template
1	math.max.1.xsl	math.max.data.1.xml	math.max.result.1.xml	example	N
2	math.max.2.xsl	math.max.data.1.xml	math.max.result.1.xml	example	Y
3	math.max.1.xsl	math.max.data.2.xml	math.max.result.2.xml	boundary	N
4	math.max.2.xsl	math.max.data.2.xml	math.max.result.2.xml	boundary	Y
5	math.max.3.xsl	math.max.data.1.xml	-	error	N
6	math.max.4.xsl	math.max.data.1.xml	-	error	Y
7	math.max.5.xsl	math.max.data.5.xml	math.max.result.5.xml	example	N

Change History

Submitted: 2001-03-28
Creator: Jeni Tennison(http://www.jenitennison.com)

Returns the maximum value from a node-set.

Version	Modified	By	Details
1.1	2001-04-28	Jeni Tennison	Added condition that `math:max()` must return `NaN` if any of the values of the nodes in the node set passed as the argument have a numerical value of `NaN`. Changed the definition of the maximum to be the value of the first node in the node list when sorted as with `xsl:sort` with a data type of `number` in `descending` order.
1.2	2001-05-22	Jeni Tennison	Added vendor implementations in Saxon and 4XSLT Changed status to stable
1.3	2001-06-11	Jeni Tennison	Added vendor implementation in jd.xslt.
1.4	2001-08-23	Jeni Tennison	Added vendor implementation in libxslt.
1.5	2002-08-20	Craig Stewart	Added Xalan-J implementation to the list.
1.6	2002-11-12	Craig Stewart	Updated 4XSLT version to 0.12.0a3.

Copyright

This material is in the public domain.