RE: only display if subnodes occur more than once

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Subject: RE: only display if subnodes occur more than once
From: Wendell Piez <wapiez@xxxxxxxxxxxxxxxx>
Date: Tue, 05 Jul 2005 16:33:49 -0400

Aron,

Thanks.

Of course the solution I posted doesn't work either, due to limitations of XPath 1.0 and the fact that current() refers not to any node being predicated, but to the current node (the node matched).

Quite an interesting problem, actually. It should be pretty straightforward in XPath 2.0, but the only XSLT 1.0 solutions I've thought of are very ugly and un-XSLTish. That may be unavoidable, again due to limitations in XPath 1.0 -- but before posting one of those I thought I'd give time to see if others can work it out more elegantly....

Anyone?

Oh heck, here's an ugly solution:

<xsl:template match="root/*">
  <xsl:variable name="include">
    <xsl:call-template name="include"/>
  </xsl:variable>
  <xsl:if test="string($include)">
    <xsl:copy-of select="."/>
  </xsl:if>
</xsl:template>

<xsl:template name="include">
  <xsl:for-each select="*">
    <xsl:if test="following-sibling::*[name()=name(current())]">X</xsl:if>
  </xsl:for-each>
</xsl:template>

It uses a template to fake a function, which returns a null value (which fails the string() test) if there are no children that have following siblings of the same name.

Cheers,
Wendell

At 03:35 PM 7/5/2005, you wrote:

The original problem asked (I think), given:

<root>
        <sub_a>
                <elem_1/>
                <elem_2/>
                <elem_3/>
        </sub_a>
        <sub_b>
                <elem_1/>
                <elem_2/>
                <elem_2/>
                <elem_2/>
                <elem_3/>
        </sub_b>
        <sub_c>
                <elem_1/>
                <elem_2/>
                <elem_3/>
        </sub_c>
</root>

output:

<root>
        <sub_b>
                <elem_2/>
                <elem_2/>
                <elem_2/>
        </sub_b>
</root>

Namely, output those sub_* which have more than 1 elem_* children named the same; also output the elem_* children.

--A

======================================================================
Wendell Piez                            mailto:wapiez@xxxxxxxxxxxxxxxx
Mulberry Technologies, Inc.                http://www.mulberrytech.com
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
======================================================================

Current Thread
RE: only display if subnodes occur more than once Aron Bock - 3 Jul 2005 17:01:22 -0000 Wendell Piez - 5 Jul 2005 19:18:24 -0000 Aron Bock - 5 Jul 2005 19:36:12 -0000 Wendell Piez - 5 Jul 2005 20:44:19 -0000 <= David Carlisle - 5 Jul 2005 21:25:12 -0000 David Carlisle - 5 Jul 2005 21:46:35 -0000 Wendell Piez - 5 Jul 2005 22:10:03 -0000 David Carlisle - 5 Jul 2005 22:24:42 -0000

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