[xsl] regexp question

[Bruce D'Arcus <bdarcus@xxxxxxxxxxxxx>]

Using XSLT 2.o, I want to take this:

	<meta name="pdate" content="20001123"/>

.... and get this:

	<meta name="dateIssued" content="2000-11-23"/>

Why isn't the following pattern matching (in the xhtml:meta template), 
and is there a better way?

    <xsl:when test="@name='pdate'">
      <xsl:analyze-string select="@content" 
regex='(\d[4])(\d[2])(\d[2])'>
	<xsl:matching-substring>
	  <meta name="dateIssued">
	    <xsl:attribute name="content">
	      <xsl:value-of select="regex-group(1)"/>
	      <xsl:text>-</xsl:text>
	      <xsl:value-of select="regex-group(2)"/>
	      <xsl:text>-</xsl:text>
	      <xsl:value-of select="regex-group(3)"/>
	    </xsl:attribute>
	  </meta>
	</xsl:matching-substring>
	<xsl:non-matching-substring>
	  <meta name="dateIssued" content="{.}"/>
	</xsl:non-matching-substring>
      </xsl:analyze-string>
    </xsl:when>

Bruce