diff -rc docbook5-xsl-1.72.0-orig/html/xref.xsl docbook5-xsl-1.72.0/html/xref.xsl
*** docbook5-xsl-1.72.0-orig/html/xref.xsl	2007-01-23 21:50:22.000000000 +0100
--- docbook5-xsl-1.72.0/html/xref.xsl	2007-02-05 12:53:50.000000000 +0100
***************
*** 898,903 ****
--- 898,908 ----
          <!-- If it has content, use it -->
          <xsl:apply-templates/>
        </xsl:when>
+       <xsl:when test="@xlink:href">
+         <a href="@xlink:href">
+           <xsl:value-of select="@xlink:href"/>
+         </a>
+       </xsl:when>
        <xsl:otherwise>
          <!-- else look for an endterm -->
          <xsl:choose>