How to customize / edit wiki theme in content_entry.xsl file to display tags for blog pages and not wiki pages?

Question

I am trying to customize a wiki theme by displaying the "Edited Today at… by…" for only blog pages and not wiki pages. 
I tried editing the content_entry.xsl with an xsl if tag, but failed.
<xsl:if test="context/link='/groups/groupname/weblog/'">
  <div id="entry_date" class="entry_date">
    <a href="{../contentEntry/historyURL}" id="history_link" title="{../../jsstrings/tooltips_history_link}" onclick="return false"><xsl:value-of select="../../strings/History"/></a>
    <span id="history_time_author"><xsl:value-of select="historyTimeAuthor" disable-output-escaping="yes"/></span>
  </div>
</xsl:if>
What is the correct <xsl:if test=""> tag, that would execute this? 
For <xsl:if test="context/"> I believe the content after "context/" are variables like link, baseHREF, contentEntry.  What are other variables I can use?

Answer 1

I also tried it this way, but does not seem to work. 
  <xsl:if test="context/link='/groups/groupname/weblog/'">
        <xsl:template match="context/entryMeta">
            <div class="metadata" id="entry_metadata">
                <div class="start startmetadata"><span></span></div>
                    <div class="contents contentsmetadata">
                        <div id="entry_date" class="entry_date">
                                        <a href="{../contentEntry/historyURL}" id="history_link" title="{../../jsstrings/tooltips_history_link}" onclick="return false"><xsl:value-of select="../../strings/
History"/></a>
                                        <span id="history_time_author"><xsl:value-of select="historyTimeAuthor" disable-output-escaping="yes"/></span>
                              </div>
                         </div>
                    <div class="end endmetadata"><span></span></div>
               </div>
          </xsl:template>
     </xsl:if>