Пытаюсь посчитать метки

    <span style="color: #cacaca">(<xsl:value-of select="count(tags/tag)"/>)</span>

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   <!-- ОблакоТэгов -->
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      <xsl:apply-templates select="/document"/>
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   <xsl:template match="/document">
      
      <xsl:if test="count(InformationSystem/tags/tag) != 0">
         <h2>Метки
            <!-- &#151; <xsl:value-of select="InformationSystem/name" />--></h2>
         
         <xsl:variable name="max_tag_count" select="(/document/InformationSystem/tags/tag/count[not(. &lt; /document/InformationSystem/tags/tag/count)])[1] - 1"/>
         
         <xsl:variable name="max_size" select="16"/>
         <xsl:variable name="min_size" select="9"/>
         
         <xsl:variable name="coeff_size">
            <xsl:choose>
               <xsl:when test="$max_tag_count &gt; 0">
                  <xsl:value-of select="($max_size - $min_size) div $max_tag_count"/>
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   <!-- Облако из групп -->
   <xsl:template match="tag">
      
      
      <xsl:param name="min_size"/>
      <xsl:param name="coeff_size" select="10"/>
      <!-- Нужный размер шрифта вычисляется по формуле $min_size + количество * $coeff_size -->
      <xsl:variable name="size" select="round($min_size + ((count - 1) * $coeff_size))"/>
      
      <a href="{/document/InformationSystem/url}tag/{tag_path_name}/" style="font-size: {$size}pt;">
         <xsl:value-of select="tag_name"/>
      </a>&#xA0;
      <span style="color: #cacaca">(<xsl:value-of select="count(/document/InformationSystem/tags/tag)"/>)</span>
      
   </xsl:template>
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<?xml version="1.0" encoding="windows-1251"?>
<document>
<InformationSystem id="16">
<name>В НАЛИЧИИ</name>
<description>&lt;p&gt;&lt;a href=&quot;/guestbook/&quot;&gt;&lt;/a&gt;&lt;/p&gt;</description>
<url>/news-auto/</url>
<access>0</access>
<tags>
<tag id="104">
<tag_name>Ci</tag_name>
<tag_path_name>Ci</tag_path_name>
<count>2</count>
</tag>
</tags>
</InformationSystem>
</document>

<span style="color: #cacaca">(<xsl:value-of select="count(/document/InformationSystem/tags/tag)"/>)</span>

<span style="color: #cacaca">(<xsl:value-of select="count"/>)</span>