[xsl] xsl:template having both name and match

[Dave Tucker <dbtucker@xxxxxxxxxx>]

> Date: Thu, 3 Mar 2005 04:34:09 -0800 (PST)
> From: Mukul Gandhi <mukul_gandhi@xxxxxxxxx>
> Message-ID: <20050303123410.39196.qmail@xxxxxxxxxxxxxxxxxxxxxxx>
> 
> [...]
> 
> This means that we can write a xsl:template having
> *both* name and match attributes..
> 
> I want to know in which circumstances such a template
> definition is useful.. Can somebody please provide an
> example where this has real practical use..?
> 
> Till now I have'nt felt such a need.. I always create
> xsl:template with name and match attributes as 2
> seperate templates, and never in a single template.. I
> want to know the practical use when both name and
> match attributes on xsl:template would be required..

Yes, it has a practical use.

I use this capability to write templates where the first invocation
comes from matching some source element, and subsequent invocations
are from recursive calls.  For example:

  <xsl:template match="insert-events" name="insert-events">
    <xsl:param name="days-from-now">0</xsl:param>

    <xsl:if test="$days-from-now &lt; 7">
      <!-- process this day -->
      <!-- ... -->

      <!-- recursively call insert-event for next day -->
      <xsl:call-template name="insert-events">
        <xsl:with-param name="days-from-now" select="$days-from-now + 1"/>
      </xsl:call-template>
    </xsl:if>
  </xsl:template>

Notice that this pattern also relies on having default parameter
values.

Dave