String Functions in XSLT

Overview

This article explains how to implement string functions in your mapping files when running them in Zynk Workflow. These functions allow you to perform a range of additional string operations from within an XSLT.

• Namespace: urn:StringFunctions
• Available since: 2026.6.3

Declaration

To use string functions, you need to add the namespace declaration to your XSLT file:

<xsl:stylesheet 
    version="1.0"
    xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
    xmlns:StringFunctions="urn:StringFunctions"
    exclude-result-prefixes="StringFunctions">

    <!-- transformation -->

</xsl:stylesheet>

Functions

Below is a list of available functions within the urn:StringFunctions namespace:

EndsWith

Checks if the end of the input string matches the value string.

Overloads

• EndsWith(string input, string value)

RegexMatch

Checks whether the specified regular expression finds a match in the specified input string.

Overloads

• RegexMatch(string input, string pattern)

RegexReplace

Within the specified input string, replaces all strings that match the specified regular expression with the specified replacement string.

Overloads

• RegexReplace(string input, string pattern, string replacement)

Replace

Returns the input string, but with all occurrences of the specified oldValue string replaced with the newValue string.

Overloads

• Replace(string input, string oldValue, string newValue)

ToLower

Converts the specified string to lower case.

Overloads

• ToLower(string input)

ToUpper

Converts the specified string to upper case.

Overloads

• ToUpper(string input)

Example

Input XML

<?xml version="1.0" encoding="utf-8"?>
<Customers>
    <Customer>
        <Id>1</Id>
        <Name>Zynk Software Limited</Name>
        <Email>[email protected]</Email>
        <TaxCode>T1</TaxCode>
    </Customer>
    <Customer>
        <Id>2</Id>
        <Name>John Smith</Name>
        <Email>[email protected]</Email>
        <TaxCode>T1</TaxCode>
    </Customer>
</Customers>

XSLT

<xsl:stylesheet
    version="1.0" 
    xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
    xmlns:StringFunctions="urn:StringFunctions"
    exclude-result-prefixes="StringFunctions">

    <xsl:output indent="yes" />

    <xsl:template match="/">
        <Company>
            <Customers>
                <xsl:for-each select="Customers/Customer">
                    <xsl:call-template name="Customer" />
                </xsl:for-each>
            </Customers>
        </Company>
    </xsl:template>

    <xsl:template name="Customer">
        <Customer>
            <Id><xsl:value-of select="Id" /></Id>
            <NameUpper><xsl:value-of select="StringFunctions:ToUpper(Name)" /></NameUpper>
            <NameLower><xsl:value-of select="StringFunctions:ToLower(Name)" /></NameLower>
            <IsCompany><xsl:value-of select="StringFunctions:RegexMatch(Name, '(?i)(\W|^)(limited|ltd|company|inc|plc)(\W|$)')" /></IsCompany>
            <EmailDomain><xsl:value-of select="StringFunctions:RegexReplace(Email, '[\w.-]+@', '')" /></EmailDomain>
            <IsGmail><xsl:value-of select="StringFunctions:EndsWith(Email, '@gmail.com')" /></IsGmail>
            <TaxCode><xsl:value-of select="StringFunctions:Replace(TaxCode, 'T', '')" /></TaxCode>
        </Customer>
    </xsl:template>    
</xsl:stylesheet>

Output XML

<Company>
    <Customers>
        <Customer>
            <Id>1</Id>
            <NameUpper>ZYNK SOFTWARE LIMITED</NameUpper>
            <NameLower>zynk software limited</NameLower>
            <IsCompany>true</IsCompany>
            <EmailDomain>zynk.com</EmailDomain>
            <IsGmail>false</IsGmail>
            <TaxCode>1</TaxCode>
        </Customer>
        <Customer>
            <Id>2</Id>
            <NameUpper>JOHN SMITH</NameUpper>
            <NameLower>john smith</NameLower>
            <IsCompany>false</IsCompany>
            <EmailDomain>gmail.com</EmailDomain>
            <IsGmail>true</IsGmail>
            <TaxCode>1</TaxCode>
        </Customer>
    </Customers>
</Company>