The CDATA Section interface is used within XML for including extended portions of text. This text is unescaped text, like < and & symbols. These symbols do not want to escape.
It is used like this:
<![CDATA[ ... ]]>
Here’s an example:
<p>The following is CDATA <![CDATA[ < > & ]]> with symbols that do not need escaping. </p>
To avoid parsing <> &, it gets added in <script>…</script>. It is not needed in HTML. Let’s see how CDATA gets added in <script> tags:
Note: CDATA is now deprecated. Do not use.