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XML, XSLT and XPATH Discussion Thread
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Jun 25th, 2009

Conditional CDATA

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Hello everyone. I am trying to implement CDATA wrapping of values conditionally in XSLT.
My requirements are:
- If the value contains <, >, &, ", ' then it must be wrapped in CDATA in the transformed output.
- if the value does not contain any of the above characters, it will not be wrapped in CDATA
- This logic will need to be implemented on many fields

Does anyone have any strategies on how to do this?

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metinh

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Jun 28th, 2009

Re: Conditional CDATA

What you want to do is not supported by XSL because including these characters in your XML document renders the XML document invalid.

fpmurphy

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Jun 29th, 2009

Re: Conditional CDATA

for testing

XML, XSLT and XPATH Syntax (Toggle Plain Text)
<?xml version="1.0" encoding="UTF-8"?>
 
<root>
				<item><![CDATA[<]]></item>
				<item><![CDATA[>]]></item>
				<item><![CDATA[&]]></item>
				<item><![CDATA["]]></item>
				<item><![CDATA[']]></item>
				<item>Mc Donold's
				</item>
				<item>Siegfried &amp; Roy
				</item>
				<item>a &gt;b
				</item>
				<item>a &lt;b
				</item>
</root>
<?xml version="1.0" encoding="UTF-8"?>

<root>
				<item><![CDATA[<]]></item>
				<item><![CDATA[>]]></item>
				<item><![CDATA[&]]></item>
				<item><![CDATA["]]></item>
				<item><![CDATA[']]></item>
				<item>Mc Donold's
				</item>
				<item>Siegfried &amp; Roy
				</item>
				<item>a &gt;b
				</item>
				<item>a &lt;b
				</item>
</root>

xsl

XML, XSLT and XPATH Syntax (Toggle Plain Text)
 
<?xml version="1.0" encoding="UTF-8" ?>
 
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" indent="yes"/>
<xsl:template match="/">
	<xsl:apply-templates select="root"/>
</xsl:template>
<xsl:template match="root">
	<root>
		<xsl:apply-templates select="item"/>
	</root>
</xsl:template>
<xsl:template match="item">
	<item>
	<xsl:variable name="pos">'</xsl:variable>
	<xsl:choose>
	<xsl:when test="contains(.,'&lt;')">
		<xsl:value-of select="concat('&lt;![CDATA[',.,']]&gt;')"/>
	</xsl:when>
	<xsl:when test="contains(.,'&gt;')">
		<xsl:value-of select="concat('&lt;![CDATA[',.,']]&gt;')"/>
	</xsl:when>
	<xsl:when test="contains(.,'&amp;')">
		<xsl:value-of select="concat('&lt;![CDATA[',.,']]&gt;')"/>
	</xsl:when>
	<xsl:when test="contains(.,'&quot;')">
		<xsl:value-of select="concat('&lt;![CDATA[',.,']]&gt;')"/>
	</xsl:when>
	<xsl:when test="contains(.,$pos)">
		<xsl:value-of select="concat('&lt;![CDATA[',.,']]&gt;')"/>
	</xsl:when>
	<xsl:otherwise>
		<xsl:value-of select="."/>
	</xsl:otherwise>
	</xsl:choose>
	</item>
</xsl:template>
</xsl:stylesheet>
<?xml version="1.0" encoding="UTF-8" ?>

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" indent="yes"/>
<xsl:template match="/">
	<xsl:apply-templates select="root"/>
</xsl:template>
<xsl:template match="root">
	<root>
		<xsl:apply-templates select="item"/>
	</root>
</xsl:template>
<xsl:template match="item">
	<item>
	<xsl:variable name="pos">'</xsl:variable>
	<xsl:choose>
	<xsl:when test="contains(.,'&lt;')">
		<xsl:value-of select="concat('&lt;![CDATA[',.,']]&gt;')"/>
	</xsl:when>
	<xsl:when test="contains(.,'&gt;')">
		<xsl:value-of select="concat('&lt;![CDATA[',.,']]&gt;')"/>
	</xsl:when>
	<xsl:when test="contains(.,'&amp;')">
		<xsl:value-of select="concat('&lt;![CDATA[',.,']]&gt;')"/>
	</xsl:when>
	<xsl:when test="contains(.,'&quot;')">
		<xsl:value-of select="concat('&lt;![CDATA[',.,']]&gt;')"/>
	</xsl:when>
	<xsl:when test="contains(.,$pos)">
		<xsl:value-of select="concat('&lt;![CDATA[',.,']]&gt;')"/>
	</xsl:when>
	<xsl:otherwise>
		<xsl:value-of select="."/>
	</xsl:otherwise>
	</xsl:choose>
	</item>
</xsl:template>
</xsl:stylesheet>

result

XML, XSLT and XPATH Syntax (Toggle Plain Text)
 
<?xml version="1.0" encoding="utf-8"?>
<root>
   <item>&lt;![CDATA[&lt;]]&gt;</item>
   <item>&lt;![CDATA[&gt;]]&gt;</item>
   <item>&lt;![CDATA[&amp;]]&gt;</item>
   <item>&lt;![CDATA["]]&gt;</item>
   <item>&lt;![CDATA[']]&gt;</item>
   <item>&lt;![CDATA[Mc Donold's
				]]&gt;</item>
   <item>&lt;![CDATA[Siegfried &amp; Roy
				]]&gt;</item>
   <item>&lt;![CDATA[a &gt;b
				]]&gt;</item>
   <item>&lt;![CDATA[a &lt;b
				]]&gt;</item>
</root>
<?xml version="1.0" encoding="utf-8"?>
<root>
   <item>&lt;![CDATA[&lt;]]&gt;</item>
   <item>&lt;![CDATA[&gt;]]&gt;</item>
   <item>&lt;![CDATA[&amp;]]&gt;</item>
   <item>&lt;![CDATA["]]&gt;</item>
   <item>&lt;![CDATA[']]&gt;</item>
   <item>&lt;![CDATA[Mc Donold's
				]]&gt;</item>
   <item>&lt;![CDATA[Siegfried &amp; Roy
				]]&gt;</item>
   <item>&lt;![CDATA[a &gt;b
				]]&gt;</item>
   <item>&lt;![CDATA[a &lt;b
				]]&gt;</item>
</root>

Helmut Hagemann

xml_looser

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Jul 1st, 2009

Re: Conditional CDATA

Click to Expand / Collapse Quote originally posted by fpmurphy ...

What you want to do is not supported by XSL because including these characters in your XML document renders the XML document invalid.

Sorry that I was not clearer. I should have added "It is possble however to include these characters if you guard them with <![CDATA[ ... ]]. "

As I understand it, the OP wants to know how to detect these characters in a document using XSL and, if found, then add "<![CDATA[ ... ]]" guards. A totally different issue than you show in your example.

fpmurphy

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Solved Threads: 11

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since Oct 2008

This thread is more than three months old

No one has posted to this discussion for at least three months. Please let old threads die and do not reply to them unless you feel you have something new and valuable to contribute that absolutely must be added to make the discussion complete. Otherwise, please start a new thread in this forum instead.

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