February 11, 2002 - Adding A CDATA Section to An XML Tree
February 11, 2002 Adding A CDATA Section to An XML Tree Tips: February 2002
Yehuda Shiran, Ph.D.
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CDATA
node to an XML tree with the createCDATASection()
method. The CDATA
tags, <![CDATE[
and ]]>
, keep the text from being interpreted as markup language. The syntax of the method is:
createCDTATSection(data)
where data
is the text within the element's tags. Let's look at an example. First, let's read in our mydvd
XML file:
var xmlDoc = new ActiveXObject("Msxml2.DOMDocument");
xmlDoc.async = false;
xmlDoc.load("mydvd.xml");
Now, create the new CDATA
object:
var cdataSection = xmlDoc.createCDATASection("This
is a comment. It is not parsed by the XML parser. You
can include inside this section");
We append the new cdataSection
node to the DOM
's root:
xmlDoc.documentElement.appendChild(cdataSection);
Let's summarize the above calls in one function:
function addCDATASection() {
var xmlDoc = new ActiveXObject("Msxml2.DOMDocument");
var namedNodeMap;
xmlDoc.async = false;
xmlDoc.load("mydvd.xml");
alert(xmlDoc.documentElement.xml);
var cdataSection = xmlDoc.createCDATASection("This is
a comment. It is not parsed by the XML parser. You can
include inside this section");
xmlDoc.documentElement.appendChild(cdataSection);
alert(xmlDoc.documentElement.xml);
}
Try it now. The first alert box echoed the XML file before adding the CDATA
section. The second alert box reflects the addition. Notice the new CDATA
element at the bottom of the XML document.