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How to address cdata blocks


abartsch
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Hi everybody, I'm new to XSLT and face a problem with cdata which is most probably a simple question for you. I have following XML input (which is mandatory):

<table title="Installed Packages" separator="=" caption="true" appendix="false">		    <![CDATA[Variant Name = APS]]>		    <![CDATA[b04hlr02a_VD = Z04Y5V641200]]>		    ...</table>

I'd like to address each cdata line separately but I don't know how. The corresponding XSLT part looks like that:

<xsl:when test="table[@title='Installed Packages']">	   <tr id="trResultOK">		    <td style="text-align:center"><xsl:value-of select="id"/></td>		    <td style="text-align:center"><xsl:value-of select="result"/></td>		    <td style="text-align:center"><xsl:value-of select="priority"/></td>		    <td><xsl:value-of select="text[@type='description']"/></td>		    <td><xsl:value-of select="table"/></td>	   </tr></xsl:when>

As you can see, for now I address the table element just as a whole but I'd like to have each cdata block separately i.e. every cdata should be one line in the HTML document ending with a newline. Or with other words the table data should have separate lines for each single cdata block. The HTML could look like following:

<td>	   Variant Name = APS<br />	   b04hlr02a_VD = Z04Y5V641200<br />	  ...</td>

I'd be very thankful for any help.

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Are you using an XSLT 1.0 processor or an XSLT 2.0 processor?This is not possible with XSLT 1.0 for sure... I'm not entirely positive about XSLT 2.0.

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In case one cannot address cdata separately using XPATH neither with XSLT 1.0 nor with 2.0 maybe you have an idea to modify the cdata within a template. I already tried XSL function like substring-before and substring-after but this does not work for me. PS: Within Perl I would implement a pattern match for "string = string" but how to do this using XSL?

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Sorry, but XSLT is not the right tool to deal with CDATA sections as the XSLT/XPath/XQuery data model does not know any CDATA sections so the stylesheet operates on a tree model with a single text node where the original markup in the source document has adjacent text and/or CDATA sections.If you need to manipulate CDATA section then you need a different data model and API, like DOM or like LINQ to XML.

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I'm calling the XSLT processor using PHP. Maybe, I have some possibilities to manipulate cdata in within PHP call? Here comes the code snipet:

$xml = new DOMDocument;$xml->load("xml/$hostname.log.xml");$xsl = new DOMDocument;$xsl->load("xml/results.xsl");$proc = new XSLTProcessor;$proc->importStyleSheet($xsl);print(trim($proc->transformToXML($xml)));

Thanks so far!

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PHP's DOM implementation has http://www.php.net/manual/en/class.domcdatasection.php so with the DOM you should be able to find and distinguish CDATA section nodes. So pseudo code (sorry, I don't code with PHP) would be e.g.

  $table = $xml->getElementsByTagName("table")->item(0);  for ($i = $table->childNodes->length - 1; i >= 0; i--) {    $child = $table->childNodes->item(i);    if ($child->nodeType == [b]XML_CDATA_SECTION_NODE) {[/b]	  $cdataWrapper = $xml->createElement("wrapper");	  $cdataWrapper->textContent = $child->nodeValue;	  $child->parentNode->replaceChild($cdataWrapper, $child);   }  }

Then in your stylesheet code you could match on e.g. table/wrapper.

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Based on Martin's idea I could solve my problem:

	$xml = new DOMDocument;	$xml->formatOutput = true;	$xml->load("xml/$hostname.log.xml");	$elements = $xml->getElementsByTagName("*");	foreach($elements as $element)	{	 foreach($element->childNodes as $item)	 {	  if( $item->nodeType == 4 ) // XML_CDATA_SECTION_NODE	  {	   $cdataWrapper = $xml->createElement("wrapper", $item->nodeValue);	   $element->parentNode->appendChild($cdataWrapper);	   // $item->parentNode->replaceChild($cdataWrapper, $item);	  }	 }	}	$xsl = new DOMDocument;	$xsl->load("xml/wrapper.xsl");	$proc = new XSLTProcessor;	$proc->importStyleSheet($xsl);	print(trim($proc->transformToXML($xml)));

Unfortunately, the replaceChild method did not work for me but I guess it's because I need the for-loop starting with the last cdata block as proposed by Martin. Anyway, this code adds XML wrapper tags for each cdata block separately which I can address via XSLT:

		  <xsl:when test="wrapper">		   <td><xsl:for-each select="wrapper">		    <xsl:value-of select="." /><br />		   </xsl:for-each></td>		  </xsl:when>

Thanks to all who were supporting me! :good:

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