Searching for a pattern in a string

Function matches() is used to find patterns specified by a regular expression in a string. If a match is found the function returns boolean value "true" otherwise it returns "false".

The first matches() is successful as the string contains string "do" followed by one or more whitespace characters and the string "you".

The second matches() is unsuccessful as it cannot find 6 non-whitespace characters in a row.

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="matches(.,'do\s+you')"/>
                  </xxx>
                  <yyy>
                        <xsl:value-of  select="matches(.,'\S{6}')"/>
                  </yyy>
            </xsl:template>

      </xsl:stylesheet>

XML

Output

<xxx>true</xxx>
<yyy>false</yyy>

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