Re: [xsl] Count() elements in range

Subject: Re: [xsl] Count() elements in range
From: Wendell Piez <wapiez@xxxxxxxxxxxxxxxx>
Date: Thu, 16 Oct 2003 15:43:10 -0400

This is nice. I was going to suggest a key-based grouping solution, but this works.

I particularly like the trick of passing the preceding siblings into a template as a parameter and then filtering from them using another parameter as a criterion: that technique could be useful....


At 01:00 PM 10/16/2003, you wrote:
Figured it out...maybe it can help someone else!

<xsl:template match="/root/element">
    <xsl:when test="(following-sibling::element[1][child::flag]) or
(count(following-sibling::element) = 0)"> <!-- only call when it's the last
element in a series-->
      <xsl:call-template name="countFlags">
        <xsl:with-param name="nodeList" select="preceding-sibling::element"
        <xsl:with-param name="followingFlags" select
    <xsl:otherwise />

<xsl:template name="countFlags">
  <xsl:param name="nodeList"/>
  <xsl:param name="followingFlags"/>
  <xsl:value-of select="1 + count
($nodeList[count(following-sibling::element[flag]) = $followingFlags])"/>

gives output:
Element A1: 1
Element B4: 4
Element C2: 2
Element D3: 3

<element number="A1"><!--start a series of 1 -->
</element><!-- only 1 in series, so count is only 1 -->
<element number="B1"><!-- start a series of 4 -->
<element number="B2"/>
<element number="B3"/>
<element number="B4"/><!-- count the previous 3 elements -->
<element  number="C1"><!-- start a series of 2 -->
<element  number="C2"/><!--count the previous 1 element -->
<element  number="D1"><!-- start a series of 3 -->
<element  number="D2" />
<element  number="D3" /><!-- count the previous 2 elements -->

Wendell Piez                            mailto:wapiez@xxxxxxxxxxxxxxxx
Mulberry Technologies, Inc.      
17 West Jefferson Street                    Direct Phone: 301/315-9635
Suite 207                                          Phone: 301/315-9631
Rockville, MD  20850                                 Fax: 301/315-8285
  Mulberry Technologies: A Consultancy Specializing in SGML and XML

XSL-List info and archive:

Current Thread