AS:isnull

The AS:isnull function returns a specified value if the expression is NULL. If the expression is NOT NULL, this function returns the expression.

NAMESPACE

xmlns:AS="http://schema.advantages.cz/AsapFunctions"

SYNTAX

Xml isnull(string expression, string value)

PARAMETERS

Name	Description
expression	The expression to test whether is NULL
value	The value to return if expression is NULL

EXAMPLE

Source	Result
`AS:isnull('twenty', '20')`	`twenty`
`AS:isnull('', '20')`	`20`
`AS:isnull(NULL, '20')`	`20`

Stylesheet

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<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0"
    xmlns:AS="http://schema.advantages.cz/AsapFunctions"
    xmlns:date="http://exslt.org/dates-and-times" exclude-result-prefixes="AS date">
    <xsl:template match="/">
        <ROOT>
            <xsl:value-of select="AS:isnull('twenty', '20')"/>
        </ROOT>
    </xsl:template>
</xsl:stylesheet>