RE: [xsl] Need to output an opening or closing tag by itself

I have somewhat similar issue, wherein I had empty element <email/>, which I
want to be keep as empty in the resulting xml. Here it looks like:


Input:
======
<email url="xxx(_at_)xxx(_dot_)com"/>


Output requires
================
<email url="xxx(_at_)xxx(_dot_)com"/>
<fnt>
*Email: xxx(_at_)xxx(_dot_)com
</fnt>


Stylesheet
======================
<xsl:template match="email[(_at_)url]">
                <xsl:copy>
                        <xsl:copy-of select="@*"/>
                        <fnt>
                                        <xsl:choose>
                                                <xsl:when
test="count(ancestor::meta/author)!=1">
        
<xsl:text>*Corresponding author: Email: </xsl:text>
                                                </xsl:when>
                                                <xsl:otherwise>
                                                        <xsl:text>*Email:
</xsl:text>
                                                </xsl:otherwise>
                                        </xsl:choose>
                                        <xsl:value-of select="./@url"/>
                                </fnt>
                </xsl:copy>
</xsl:template>


But using the above, I am getting the following, which is not the way I
wanted:

What I get
===========
<email url="xxx(_at_)xxx(_dot_)com">
<fnt>
*Email: xxx(_at_)xxx(_dot_)com
</fnt>
</email>


I am using few other scripting languages after XML transformations, so I've
taken care of it their, but I know its not the best way of handling the XML
inputs.


Best,

Pankaj Chaturvedi

============================================================================
================


-----Original Message-----
From: Michael Kay [mailto:mike(_at_)saxonica(_dot_)com] 
Sent: Wednesday, June 25, 2008 3:04 PM
To: xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
Subject: RE: [xsl] Need to output an opening or closing tag by itself

The output of a transformation is a tree of nodes. It is not lexical XML
containing angle-bracket tags - those are produced from the result tree by
the serializer. Creating a node on the result tree is an atomic operation,
you can't create half a node.

The problem you are tackling is called positional grouping, In XSLT 2.0 you
can often tackle it using <xsl:for-each-group>. In 1.0 an appropriate
technique is often sibling recursion, where you process a sequence of
siblings one-by-one in a recursive template. You should be able to find
these techniques using a google search.

Michael Kay
http://www.saxonica.com/

-----Original Message-----
From: David Frey [mailto:dpfrey(_at_)shaw(_dot_)ca]
Sent: 25 June 2008 05:30
To: xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
Subject: [xsl] Need to output an opening or closing tag by itself

I have a simple XSLT problem for the gurus.


This is my input document:
<root>
  <e t="a"/>
  <f/>
  <f/>
  <e t="b"/>
</root>


This is the output document I want to produce:
<root>
  <e>
    <f/>
    <f/>
  </e>
</root>


This is the stylesheet I wrote to do the transformation:
<?xml version="1.0" encoding="UTF-8"?> <xsl:stylesheet
  version="1.0"
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>

  <xsl:template match="/root">
    <root>
      <xsl:apply-templates/>
    </root>
  </xsl:template>

  <xsl:template match="e">
    <xsl:choose>
      <xsl:when test="@t ='a'">
        <e>
      </xsl:when>
      <xsl:when test="@t ='b'">
        </e>
      </xsl:when>
      <xsl:otherwise>
        <xsl:message terminate="yes">
          Unexpected data in attribute t.
        </xsl:message>
      </xsl:otherwise>
    </xsl:choose>
  </xsl:template>

  <xsl:template match="f">
    <xsl:copy/>
  </xsl:template>
</xsl:stylesheet>


Here is the Saxon output:
$ java -jar "c:\Program Files\Saxon\saxon9.jar" -o out.xml in.xml 
test.xslt Error on line 16 column 9 of
file:/C:/Documents%20and%20Settings/DFREY/Desktop/test/test.xslt:
  SXXP0003: Error reported by XML parser: The element type "e" must be 
terminated by the
  matching end-tag "</e>".
Failed to compile stylesheet. 1 error detected.


I understand that the source of the error is that the XSLT file is not 
valid XML because the <e> tag doesn't have a matching </e> tag in the 
right place.

How can I work around this issue to solve my problem?

Thanks,
David

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