xml - XSLT sort working with numbers but not text -

given following xml file:

<?xml version="1.0"?> <mappings> <mapping>   <class-a>c</class-a>   <class-b>a</class-b> </mapping> <mapping>   <class-a>b</class-a>   <class-b>b</class-b> </mapping> <mapping>   <class-a>a</class-a>   <class-b>c</class-b> </mapping> </mappings> 

and following xslt file:

<xsl:stylesheet version="1.0"     xmlns:xsl="http://www.w3.org/1999/xsl/transform">  <xsl:output method="xml" omit-xml-declaration="no" indent="yes" />  <xsl:strip-space elements="*"/>   <xsl:template match="node()|@*">   <xsl:copy>    <xsl:apply-templates select="node()|@*"/>   </xsl:copy>  </xsl:template>   <xsl:template match="mappings">   <xsl:copy>     <xsl:apply-templates>           <xsl:sort select="(name() = 'mapping')*class-a" data-type="text" order="ascending" />     </xsl:apply-templates>   </xsl:copy>  </xsl:template> </xsl:stylesheet> 

produces bad xml result:

<?xml version="1.0" encoding="utf-8"?> <mappings>    <mapping>       <class-a>c</class-a>       <class-b>a</class-b>    </mapping>    <mapping>       <class-a>b</class-a>       <class-b>b</class-b>    </mapping>    <mapping>       <class-a>a</class-a>       <class-b>c</class-b>    </mapping> </mappings> 

expected result is:

<?xml version="1.0" encoding="utf-8"?> <mappings>    <mapping>       <class-a>a</class-a>       <class-b>c</class-b>    </mapping>    <mapping>       <class-a>b</class-a>       <class-b>b</class-b>    </mapping>    <mapping>       <class-a>c</class-a>       <class-b>a</class-b>    </mapping> </mappings> 

mappings should sorted alphabetically based on class-a element values.

by using numbers in place of strings class-a elements of input xml:

<?xml version="1.0"?> <mappings> <mapping>   <class-a>3</class-a>   <class-b>a</class-b> </mapping> <mapping>   <class-a>2</class-a>   <class-b>b</class-b> </mapping> <mapping>   <class-a>1</class-a>   <class-b>c</class-b> </mapping> </mappings> 

with either data-type="text" or data-type="number" in xslt sort tag, getting same expected result :

<?xml version="1.0" encoding="utf-8"?> <mappings>    <mapping>       <class-a>1</class-a>       <class-b>c</class-b>    </mapping>    <mapping>       <class-a>2</class-a>       <class-b>b</class-b>    </mapping>    <mapping>       <class-a>3</class-a>       <class-b>a</class-b>    </mapping> </mappings> 

does know how expected result text well?

you can try this:

        <xsl:sort select="class-a" data-type="text" order="ascending"  />