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Extracting substrings with substring() function

The function substring() returns a part of the string provided by the first argument. The second argument specifies the starting position in the original string, the third argument gives number of characters to extract. The numbering positions starts with number 1. If the third argument is not given the function returns a substring which starts at the position specified by the second argument and contains the remaining part of the original string.

XSLT

      <xsl:stylesheet
                  xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                  version="2.0">
            <xsl:output  method="xml"
                        indent="yes"
                        omit-xml-declaration="yes"/>

            <xsl:template  match="/aaa">
                  <xxx>
                        <xsl:value-of  select="substring(.,1,3)"/>
                  </xxx>
                  <yyy>
                        <xsl:value-of  select="substring(.,5,2)"/>
                  </yyy>
                  <zzz>
                        <xsl:value-of  select="substring(.,5)"/>
                  </zzz>
                  <ppp>
                        <xsl:value-of  select="substring(.,5,100000)"/>
                  </ppp>
            </xsl:template>

      </xsl:stylesheet>
XML

      <aaa>How are you?</aaa>
Output

      <xxx>How</xxx>
      <yyy>ar</yyy>
      <zzz>are you?</zzz>
      <ppp>are you?</ppp>


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