Gist for a discussion on the OCN here: https://ocn.omniupdate.com/forums/topic/488/grabbing-title-amp-description-of-tagged-pages-tag-api/view/post_id/1318

array-example.xml

<!-- Create a variable with the data that you want from $taggedItems -->
<xsl:variable name="myvariable">
  <xsl:for-each select="$taggedItems">
    <xsl:sort select="last-pub-date" order="descending"/>
    <item>
      <url><xsl:value-of select="..." /></url>
      <title><xsl:value-of select="..." /><title>
      <description>...</description>
    </item>
  </xsl:for-each>
</xsl:variable>


<!-- Now loop that variable -->
<xsl:for-each select="$myvariable/item">
  <xsl:if test="position() < 5">
    <strong><a href="{url}"><xsl:value-of select="{title}" /></a></strong>
  </xsl:if>
</xsl:for-each>

loop-with-position.xml

<xsl:for-each select="$taggedItems"><!-- Grab the relative PCF URL -->
  <xsl:sort select="last-pub-date" order="descending"/>
  <xsl:if test="position() < 5">
    <!-- Do Work Here --> 
  </xsl:if>
</xsl:for-each>

Updated to < 5, not > 5.