Problems with scope of variables

Local variable is visible only in following siblings of the xsl:variable element and in their descendants. In the example the xsl:value-of is not a following sibling of xsl:variable and so a fatal error occurs.

A good idea is to declare variables at the beginning of the template so this type of error does not occur.

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">
                  <xsl:apply-templates  select="*"/>
            </xsl:template>

            <xsl:template  match="bbb">
                  <aaa>
                        <xsl:variable  name="xxx"
                                    select="@x"/>
                  </aaa>
                  <bbb>
                        <xsl:value-of  select="$xxx"/>
                  </bbb>
            </xsl:template>

            <xsl:template  match="bbb"/>

      </xsl:stylesheet>

XML

Output

Error:

error - XPST0008
XPath syntax error at char C on line L in {$xxx}: Variable $xxx has not been declared

warning - SXWN9001
A variable with no following sibling instructions has no effect

Failed to compile stylesheet. 1 error detected.

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